G
SECTION G — PHYSICS
 G

Note(s)

  1. In this section, the following term is used with the meaning indicated:
    • "variable" (as a noun) means a feature or property (e.g., a dimension, a physical condition such as temperature, a quality such as density or colour) which, in respect of a particular entity (e.g., an object, a quantity of a substance, a beam of light) and at a particular instant, is capable of being measured; the variable may change, so that its numerical expression may assume different values at different times, in different conditions or in individual cases, but may be constant in respect of a particular entity in certain conditions or for practical purposes (e.g., the length of a bar may be regarded as constant for many purposes).
  2. Attention is drawn to the definitions of terms or expressions used, appearing in the notes of several of the classes in this section, in particular those of "measuring" in class G01 and "control" and "regulation" in class G05.
  3. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable extent on differences in the intention of the user rather than on any constructional differences or differences in the manner of use, and because the subjects dealt with are often in effect systems or combinations, which have features or parts in common, rather than "things", which are readily distinguishable as a whole. For example, information (e.g., a set of figures) may be displayed for the purpose of education or advertising (G09), for enabling the result of a measurement to be known (G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (G08). The words used to describe the purpose depend on features that may be irrelevant to the form of the apparatus concerned, for example, such features as the desired effect on the person who sees the display, or whether the display is controlled from a remote point. Again, a device which responds to some change in a condition, e.g., in the pressure of a fluid, may be used, without modification of the device itself, to give information about the pressure (G01L) or about some other condition linked to the pressure (another subclass of class G01, e.g., G01K for temperature), to make a record of the pressure or of its occurrence (G07C), to give an alarm (G08B), or to control another apparatus (G05).

    The classification scheme is intended to enable things of a similar nature (as indicated above) to be classified together. It is therefore particularly necessary for the real nature of any technical subject to be decided before it can be properly classified.

  
INSTRUMENTS
 G01
MEASURING; TESTING
 G01

Note(s)

  1. This class covers, in addition to "true" measuring instruments, other indicating or recording devices of analogous construction, and also signalling or control devices insofar as they are concerned with measurement (as defined in Note 2 below) and are not specially adapted to the particular purpose of signalling or control.
  2. In this class, the following term is used with the meaning indicated:
    • "measuring" is used to cover considerably more than its primary or basic meaning. In this primary sense, it means finding a numerical expression of the value of a variable in relation to a unit or datum or to another variable of the same nature, e.g. expressing a length in terms of another length as in measuring a length with a scale; the value may be obtained directly (as just suggested) or by measuring some other variable of which the value can be related to the value of the required variable, as in measuring a change in temperature by measuring a resultant change in the length of a column of mercury. However, since the same device or instrument may, instead of giving an immediate indication, be used to produce a record or to initiate a signal to produce an indication or control effect, or may be used in combination with other devices or instruments to give a conjoint result from measurement of two or more variables of the same or different kinds, it is necessary to interpret "measuring" as including also any operation that would make it possible to obtain such a numerical expression by the additional use of some way of converting a value into figures. Thus the expression in figures may be actually made by a digital presentation or by reading a scale, or an indication of it may be given without the use of figures, e.g. by some perceptible feature (variable) of the entity (e.g. object, substance, beam of light) of which the variable being measured is a property or condition or by an analogue of such a feature (e.g. the corresponding position of a member without any scale, a corresponding voltage generated in some way). In many cases there is no such value indication but only an indication of difference or equality in relation to a standard or datum (of which the value may or may not be known in figures); the standard or datum may be the value of another variable of the same nature but of a different entity (e.g. a standard measure) or of the same entity at a different time.

      In its simplest form, measurement may give merely an indication of presence or absence of a certain condition or quality, e.g. movement (in any direction or in a particular direction), or whether a variable exceeds a predetermined value.

  3. Attention is drawn to the Notes following the titles of class B81 and subclass B81B relating to "micro-structural devices" and "micro-structural systems" and the Notes following the title of subclass B82B relating to "nano-structures". [7]
  4. Attention is drawn to the Notes following the title of section G, especially as regards the definition of the term "variable".
  5. In many measuring arrangements, a first variable to be measured is transformed into a second, or further, variables. The second, or further, variables may be (a) a condition related to the first variable and produced in a member, or (b) a displacement of a member. Further transformation may be needed.  [6]

    When classifying such an arrangement, (i) the transformation step, or each transformation step, that is of interest is classified, or (ii) if interest lies only in the system as a whole, the first variable is classified in the appropriate place.  [6]

    This is particularly important where two or more conversions take place, for instance where a first variable, for example pressure, is transformed into a second variable, for example an optical property of a sensing body, and that second variable is expressed by means of a third variable, for example an electric effect. In such a case, the following classification places should be considered: the place for the transformation of the first variable, that for sensing the condition caused by that variable, subclass G01D for expression of the measurement, and finally the place for the overall system, if any.  [6]

  6. The measurement of change in the value of a physical property is classified in the same subclass as the measurement of that physical property, e.g. measurement of expansion of length is classified in subclass G01B.
 G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D, B01J, B03, B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M, C12Q; investigation of foundation soil in situ E02D 1/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, see G01D or the relevant subclass for the variable measured; testing or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C 5/02; testing component parts of nuclear reactors G21C 17/00)
 G01N

Note(s)

  1. In this subclass, the following terms are used with the meanings indicated:
    • "investigating" means testing or determining;
    • "materials" includes solid, liquid or gaseous media, e.g. the atmosphere.
  2. Attention is drawn to the Notes following the title of class G01.
  3. Investigating the properties of materials, specially adapted for use in processes covered by subclass B23K, is classified in group B23K 31/12.  [5]
 G01N
Subclass index
SAMPLING, PREPARING 1/00
INVESTIGATING OR ANALYSING CHARACTERISED BY THE PROPERTY INVESTIGATED
Mechanical strength; density; flow 3/00; 9/00; 11/00
Surface or boundary effects; characteristics of particles, permeability; friction, adhesive force 13/00; 15/00; 19/00
Resistance to atmospheric agents 17/00
INVESTIGATING OR ANALYSING CHARACTERISED BY THE METHOD USED
Weighing; measuring pressure or volume of gas; mechanical 5/00; 7/00; 19/00
Optical; by microwaves; by radiation 21/00; 22/00; 23/00
Magnetic resonance or other spin effects 24/00
Thermal; electric, electrochemical, magnetic; sonic 25/00; 27/00; 29/00
By separation into components; by the use of the chemical methods 30/00; 31/00
OTHER INVESTIGATING OR ANALYSING CHARACTERISED BY THE MATERIAL INVESTIGATED 33/00
Immunoassay 33/53
AUTOMATIC ANALYSIS 35/00
DETAILS NOT COVERED BY THE PRECEDING GROUPS 37/00
P:200 G01N 1/00
Sampling; Preparing specimens for investigation (handling materials for automatic analysis G01N 35/00)
 G01N 1/02
·  Devices for withdrawing samples (for medical or veterinary purposes A61; obtaining samples of soil or well fluids E21B 49/00)
 G01N 1/04
·  ·  in the solid state, e.g. by cutting
 G01N 1/10
·  ·  in the liquid or fluent state
 G01N 1/12
·  ·  ·  Dippers; Dredgers (suction dredgers E02F 3/88)  [5]
 G01N 1/14
·  ·  ·  Suction devices, e.g. pumps; Ejector devices
 G01N 1/16
·  ·  ·  with provision for intake at several levels (G01N 1/12, G01N 1/14 take precedence)
 G01N 1/18
·  ·  ·  with provision for splitting samples into portions (G01N 1/12, G01N 1/14 take precedence; fraction-collection apparatus for chromatography B01D 15/08)
 G01N 1/20
·  ·  ·  for flowing or falling materials (G01N 1/12, G01N 1/14 take precedence)
 G01N 1/22
·  ·  in the gaseous state
 G01N 1/24
·  ·  ·  Suction devices
 G01N 1/26
·  ·  ·  with provision for intake from several spaces
 G01N 1/28
·  Preparing specimens for investigation (mounting specimens on microscopic slides G02B 21/34; means for supporting the objects or the materials to be analysed in electron microscopes H01J 37/20)
 G01N 1/30
·  ·  Staining; Impregnating
 G01N 1/32
·  ·  Polishing; Etching
 G01N 1/34
·  ·  Purifying; Cleaning
 G01N 1/36
·  ·  Embedding or analogous mounting of samples  [6]
 G01N 1/38
·  ·  Diluting, dispersing or mixing samples  [6]
 G01N 1/40
·  ·  Concentrating samples  [6]
 G01N 1/42
·  ·  Low-temperature sample treatment, e.g. cryofixation  [6]
 G01N 1/44
·  ·  Sample treatment involving radiation, e.g. heat  [6]
P:50 G01N 3/00
Investigating strength properties of solid materials by application of mechanical stress (strain gauges G01B; measuring stress in general G01L 1/00)
 G01N 3/00

Note(s)

This group covers the stressing of materials not only below but also beyond the elastic limit, e.g. until breaking occurs.

 G01N 3/08
·  by applying steady tensile or compressive forces (G01N 3/28 takes precedence)
 G01N 3/10
·  ·  generated by pneumatic or hydraulic pressure (G01N 3/18 takes precedence)
 G01N 3/18
·  ·  Performing tests at high or low temperatures
 G01N 3/28
·  Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
 G01N 3/30
·  by applying a single impulsive force (investigating hardness by performing impressions under impulsive load G01N 3/40)
 G01N 3/32
·  by applying repeated or pulsating forces (generation of such forces in general, see the relevant classes or subclasses, e.g. B06, G10)
 G01N 3/40
·  Investigating hardness or rebound hardness
 G01N 3/56
·  Investigating resistance to wear or abrasion
 G01N 3/60
·  Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
P:60 G01N 5/00
Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid (G01N 9/00 takes precedence)
P:70 G01N 7/00
Analysing materials by measuring the pressure or volume of a gas or vapour
P:40 G01N 9/00
Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity (weighing apparatus G01G)
 G01N 9/24
·  by observing the transmission of wave or particle radiation through the material
P:30 G01N 11/00
Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
 G01N 11/10
·  by moving a body within the material
P:20 G01N 13/00
Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects; Investigating or analysing surface structures in atomic ranges  [1,7]
 G01N 13/10
·  Investigating or analysing surface structures in atomic ranges using scanning-probe techniques (by measuring secondary emission G01N 23/22; dimensional measurement using scanning-probe techniques G01B; details of scanning-probe apparatus, in general G12B 21/00)  [7]
P:10 G01N 15/00
Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials (identification of micro-organisms C12Q)  [4]
 G01N 15/02
·  Investigating particle size or size distribution (G01N 15/04, G01N 15/10 take precedence; by measuring osmotic pressure G01N 7/00; by filtering B01D; by sifting B07B)  [4]
 G01N 15/04
·  Investigating sedimentation of particle suspensions
 G01N 15/06
·  Investigating concentration of particle suspensions (G01N 15/04, G01N 15/10 take precedence; by weighing G01N 5/00)  [3]
 G01N 15/08
·  Investigating permeability, pore volume, or surface area of porous materials
 G01N 15/10
·  Investigating individual particles  [4]
 G01N 15/14
·  ·  Electro-optical investigation  [4]
P:0 G01N 17/00
Investigating resistance of materials to the weather, to corrosion, or to light
P:80 G01N 19/00
Investigating materials by mechanical methods (G01N 3/00-G01N 17/00 take precedence; measuring roughness or irregularity of surfaces G01B 5/28)
 G01N 19/02
·  Measuring coefficient of friction between materials
P:110 G01N 21/00
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light (G01N 3/00-G01N 19/00 take precedence; measuring stress in general G01L 1/00; optical elements of measuring instruments G02B; image analysis by data processing G06T)
 G01N 21/00

Note(s)

This group does not cover the investigation of spectral properties of light per se, or measurements of the properties of materials where spectral properties of light are sensed and primary emphasis is placed on creating, detecting or analysing the spectrum providing that the properties of the materials to be investigated are of minor importance (see also Note (4) after the title of class G01). Those subjects are covered by group G01J 3/00[7]

 G01N 21/01
·  Arrangements or apparatus for facilitating the optical investigation  [3]
 G01N 21/03
·  ·  Cuvette constructions  [3]
 G01N 21/11
·  ·  Filling or emptying of cuvettes  [3]
 G01N 21/13
·  ·  Moving of cuvettes or solid samples to or from the investigating station  [3]
 G01N 21/15
·  ·  Preventing contamination of the components of the optical system or obstruction of the light path  [3]
 G01N 21/17
·  Systems in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N 21/63)  [3]
 G01N 21/19
·  ·  Dichroism  [3]
 G01N 21/21
·  ·  Polarisation-affecting properties (G01N 21/19 takes precedence)  [3]
 G01N 21/25
·  ·  Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands  [3]
 G01N 21/31
·  ·  ·  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry  [3]
 G01N 21/41
·  ·  Refractivity; Phase-affecting properties, e.g. optical path length (G01N 21/21 takes precedence)  [3]
 G01N 21/47
·  ·  Scattering, i.e. diffuse reflection (G01N 21/25, G01N 21/41 take precedence)  [3]
 G01N 21/55
·  ·  Specular reflectivity  [3]
 G01N 21/59
·  ·  Transmissivity (G01N 21/25 takes precedence)  [3]
 G01N 21/62
·  Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light  [3]
 G01N 21/63
·  ·  optically excited  [3]
 G01N 21/64
·  ·  ·  Fluorescence; Phosphorescence  [3]
 G01N 21/71
·  ·  thermally excited  [3]
 G01N 21/75
·  Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated (systems in which material is burnt in a flame or plasma G01N 21/71)  [3]
 G01N 21/76
·  ·  Chemiluminescence; Bioluminescence  [3]
 G01N 21/77
·  ·  by observing the effect on a chemical indicator  [3]
 G01N 21/84
·  Systems specially adapted for particular applications  [3]
 G01N 21/85
·  ·  Investigating moving fluids or granular solids  [3]
 G01N 21/86
·  ·  Investigating moving sheets (G01N 21/88 takes precedence)  [3]
 G01N 21/87
·  ·  Investigating jewels (G01N 21/88 takes precedence)  [3]
 G01N 21/88
·  ·  Investigating the presence of flaws, defects or contamination (contactless testing of electronic circuits G01R 31/28; testing currency G07D)  [3]
P:100 G01N 22/00
Investigating or analysing materials by the use of microwaves (G01N 3/00-G01N 17/00, G01N 24/00 take precedence)  [3]
P:120 G01N 23/00
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N 21/00 or G01N 22/00, e.g. X-rays, neutrons (G01N 3/00-G01N 17/00 take precedence; measuring stress in general G01L 1/00; measurement of nuclear or X-radiation G01T; introducing objects or materials into nuclear reactors, or removing them therefrom, or storing them after treatment therein G21C; construction or operation of X-ray apparatus or circuits therefor H05G)
 G01N 23/02
·  by transmitting the radiation through the material
 G01N 23/20
·  by using diffraction of the radiation, e.g. for investigating crystal structure; by using reflection of the radiation
 G01N 23/22
·  by measuring secondary emission  [2]
P:90 G01N 24/00
Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects (arrangements or instruments for measuring magnetic resonance effects G01R 33/20)  [3,4,5]
P:130 G01N 25/00
Investigating or analysing materials by the use of thermal means (G01N 3/00-G01N 23/00 take precedence)
 G01N 25/02
·  by investigating changes of state or changes of phase; by investigating sintering
 G01N 25/18
·  by investigating thermal conductivity (by calorimetry G01N 25/20; by measuring change of resistance of an electrically-heated body G01N 27/14)
 G01N 25/20
·  by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
 G01N 25/56
·  by investigating moisture content
 G01N 25/72
·  Investigating presence of flaws (by investigating thermal conductivity G01N 25/18)
P:140 G01N 27/00
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (G01N 3/00-G01N 25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)
 G01N 27/02
·  by investigating impedance
 G01N 27/04
·  ·  by investigating resistance
 G01N 27/06
·  ·  ·  of a liquid (involving electrolysis G01N 27/26; involving polarography G01N 27/48; measuring electric resistance of fluids G01R 27/22)
 G01N 27/12
·  ·  ·  of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid
 G01N 27/14
·  ·  ·  of an electrically-heated body in dependence upon change of temperature
 G01N 27/20
·  ·  ·  Investigating the presence of flaws
 G01N 27/22
·  ·  by investigating capacitance
 G01N 27/26
·  by investigating electrochemical variables; by using electrolysis or electrophoresis (investigating resistance to corrosion G01N 17/00; investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography, G01N 30/00; immunoelectrophoresis G01N 33/558; electrochemical processes or apparatus in general B01J; standard cells H01M 6/28)  [5]
 G01N 27/27
·  ·  Association of two or more measuring systems or cells, each measuring a different parameter, where the measurement results may be either used independently, the systems or cells being physically associated, or combined to produce a value for a further parameter  [5]
 G01N 27/28
·  ·  Electrolytic cell components
 G01N 27/30
·  ·  ·  Electrodes, e.g. test electrodes; Half-cells (G01N 27/403 takes precedence)  [5]
 G01N 27/327
·  ·  ·  ·  Biochemical electrodes  [5]
 G01N 27/333
·  ·  ·  ·  Ion-selective electrodes or membranes (glass electrodes G01N 27/36)  [5]
 G01N 27/36
·  ·  ·  ·  Glass electrodes
 G01N 27/40
·  ·  ·  Semi-permeable membranes or partitions
 G01N 27/403
·  ·  Cells and electrode assemblies  [5]
 G01N 27/406
·  ·  ·  Cells and probes with solid electrolytes  [5]
 G01N 27/407
·  ·  ·  ·  for investigating or analysing gases  [5]
 G01N 27/409
·  ·  ·  ·  ·  Oxygen concentration cells  [5]
 G01N 27/41
·  ·  ·  ·  ·  Oxygen pumping cells  [5]
 G01N 27/416
·  ·  Systems (G01N 27/27 takes precedence)  [5]
 G01N 27/417
·  ·  ·  using cells and probes with solid electrolytes  [5]
 G01N 27/42
·  ·  ·  Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte  [5]
 G01N 27/447
·  ·  ·  using electrophoresis  [5]
 G01N 27/453
·  ·  ·  ·  Cells therefor  [5]
 G01N 27/48
·  ·  ·  using polarography, i.e. measuring changes in current under a slowly-varying voltage
 G01N 27/49
·  ·  ·  Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species  [5]
 G01N 27/60
·  by investigating electrostatic variables (by investigating capacitance G01N 27/22)
 G01N 27/62
·  by investigating the ionisation of gases; by investigating electric discharges, e.g. emission of cathode (particle spectrometers H01J 49/00)
 G01N 27/64
·  ·  using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
 G01N 27/68
·  ·  using electric discharge to ionise a gas
 G01N 27/72
·  by investigating magnetic variables
 G01N 27/74
·  ·  of fluids (G01N 24/00 takes precedence)
 G01N 27/80
·  ·  for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material
 G01N 27/82
·  ·  for investigating the presence of flaws
 G01N 27/90
·  ·  ·  using eddy currents  [3]
 G01N 27/92
·  by investigating breakdown voltage (G01N 27/60, G01N 27/62 take precedence; testing of articles or specimens of solids or fluids for dielectric strength or breakdown voltage G01R 31/12)  [3]
P:150 G01N 29/00
Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object (G01N 3/00-G01N 27/00 take precedence; measuring or indicating of ultrasonic, sonic or infrasonic waves in general G01H; systems using the reflection or reradiation of acoustic waves, e.g. acoustic imaging, G01S 15/00; obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves G03B 42/00)  [4]
 G01N 29/02
·  Analysing fluids (using acoustic emission techniques G01N 29/14)  [5,8]
 G01N 29/04
·  Analysing solids (using acoustic emission techniques G01N 29/14)  [4,5,8]
 G01N 29/06
·  ·  Visualisation of the interior, e.g. acoustic microscopy  [4,8]
 G01N 29/12
·  ·  by measuring frequency or resonance of acoustic waves  [5,8]
 G01N 29/14
·  using acoustic emission techniques  [5,8]
 G01N 29/22
·  Details  [5]
 G01N 29/24
·  ·  Probes  [5]
 G01N 29/26
·  ·  Arrangements for orientation or scanning  [5]
 G01N 29/28
·  ·  providing acoustic coupling  [5]
 G01N 29/34
·  Generating the ultrasonic, sonic or infrasonic waves  [8]
 G01N 29/36
·  Detecting the response signal  [8]
 G01N 29/44
·  Processing the detected response signal  [8]
P:160 G01N 30/00
Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography (G01N 3/00-G01N 29/00 take precedence; separation for the preparation or production of components B01D 15/00, B01D 53/02, B01D 53/14)  [4]
P:170 G01N 31/00
Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups (testing the effectiveness or completeness of sterilisation procedures without using enzymes or microorganisms A61L 2/26; measuring or testing processes involving enzymes or micro-organisms C12Q 1/00); Apparatus specially adapted for such methods  [4]
 G01N 31/00

Note(s)

The observation of the progress of the reactions covered by groups G01N 31/02-G01N 31/22 by any of the methods specified in groups G01N 3/00-G01N 29/00, if this observation is of major importance, is classified in the relevant group covering the method.

 G01N 31/02
·  using precipitation
 G01N 31/10
·  using catalysis
 G01N 31/12
·  using combustion (G01N 25/20 takes precedence)
 G01N 31/16
·  using titration
 G01N 31/20
·  using micro-analysis, e.g. drop reaction
 G01N 31/22
·  using chemical indicators (G01N 31/02 takes precedence)
P:180 G01N 33/00
Investigating or analysing materials by specific methods not covered by groups G01N 1/00-G01N 31/00
 G01N 33/02
·  Food
 G01N 33/15
·  Medicinal preparations  [3]
 G01N 33/18
·  Water
 G01N 33/20
·  Metals
 G01N 33/22
·  Fuels; explosives
 G01N 33/24
·  Earth materials (G01N 33/42 takes precedence)
 G01N 33/26
·  Oils; viscous liquids; paints; inks (G01N 33/22 takes precedence; edible oils or edible fats G01N 33/02)
 G01N 33/34
·  Paper
 G01N 33/36
·  Textiles
 G01N 33/38
·  Concrete; lime; mortar; gypsum; bricks; ceramics; glass
 G01N 33/40
·  Grinding-materials
 G01N 33/42
·  Road-making materials (G01N 33/38 takes precedence)
 G01N 33/44
·  Resins; plastics; rubber; leather
 G01N 33/46
·  Wood
 G01N 33/48
·  Biological material, e.g. blood, urine (G01N 33/02, G01N 33/26, G01N 33/44, G01N 33/46 take precedence; determining the germinating capacity of seeds A01C 1/00); Haemocytometers (counting blood corpuscules distributed over a surface by scanning the surface G06M 11/00)  [3,4]
 G01N 33/483
·  ·  Physical analysis of biological material  [4]
 G01N 33/487
·  ·  ·  of liquid biological material  [4]
 G01N 33/49
·  ·  ·  ·  blood  [4]
 G01N 33/50
·  ·  Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing (measuring or testing processes other than immunological involving enzymes or micro-organisms, compositions or test papers therefor; processes of forming such compositions, condition responsive control in microbiological or enzymological processes C12Q)  [3]
 G01N 33/50

Note(s)

In this group, the following expression is used with the meaning indicated:

  • "involving", when used in relation to a material, includes the testing for the material as well as employing the material as a determinant or reactant in a test for a different material. [3]

 G01N 33/52 - 
G01N 33/98

Note(s)

In groups G01N 33/52-G01N 33/98, in the absence of an indication to the contrary, classification is made in the last appropriate place.   [3]

 G01N 33/52
·  ·  ·  Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper  [3]
 G01N 33/53
·  ·  ·  Immunoassay; Biospecific binding assay; Materials therefor (medicinal preparations containing antigens or antibodies A61K; haptens in general, see the relevant places in class C07; peptides, e.g. proteins, in general C07K)  [4]
 G01N 33/531
·  ·  ·  ·  Production of immunochemical test materials  [4]
 G01N 33/532
·  ·  ·  ·  ·  Production of labelled immunochemicals  [4]
 G01N 33/533
·  ·  ·  ·  ·  ·  with fluorescent label  [4]
 G01N 33/534
·  ·  ·  ·  ·  ·  with radioactive label  [4]
 G01N 33/535
·  ·  ·  ·  ·  ·  with enzyme label  [4]
 G01N 33/536
·  ·  ·  ·  with immune complex formed in liquid phase  [4]
 G01N 33/543
·  ·  ·  ·  with an insoluble carrier for immobilising immunochemicals  [4]
 G01N 33/544
·  ·  ·  ·  ·  the carrier being organic  [4]
 G01N 33/551
·  ·  ·  ·  ·  the carrier being inorganic  [4]
 G01N 33/554
·  ·  ·  ·  ·  the carrier being a biological cell or cell fragment, e.g. bacteria, yeast cells  [4]
 G01N 33/557
·  ·  ·  ·  using kinetic measurement, i.e. time rate of progress of an antigen-antibody interaction  [4]
 G01N 33/558
·  ·  ·  ·  using diffusion or migration of antigen or antibody  [4]
 G01N 33/563
·  ·  ·  ·  involving antibody fragments  [4]
 G01N 33/564
·  ·  ·  ·  for pre-existing immune complex or autoimmune disease  [4]
 G01N 33/566
·  ·  ·  ·  using specific carrier or receptor proteins as ligand binding reagent  [4]
 G01N 33/567
·  ·  ·  ·  ·  utilising isolate of tissue or organ as binding agent  [4]
 G01N 33/569
·  ·  ·  ·  for micro-organisms, e.g. protozoa, bacteria, viruses  [4]
 G01N 33/571
·  ·  ·  ·  ·  for venereal disease, e.g. syphilis, gonorrhoea, herpes  [4]
 G01N 33/573
·  ·  ·  ·  for enzymes or isoenzymes  [4]
 G01N 33/574
·  ·  ·  ·  for cancer  [4]
 G01N 33/576
·  ·  ·  ·  for hepatitis  [4]
 G01N 33/577
·  ·  ·  ·  involving monoclonal antibodies  [4]
 G01N 33/579
·  ·  ·  involving limulus lysate  [4]
 G01N 33/58
·  ·  ·  involving labelled substances (G01N 33/53 takes precedence; for testing in vivo A61K 51/00)  [3]
 G01N 33/60
·  ·  ·  ·  involving radioactive labelled substances (tracers G21H 5/00)  [3]
 G01N 33/62
·  ·  ·  involving urea  [3]
 G01N 33/64
·  ·  ·  involving ketones  [3]
 G01N 33/66
·  ·  ·  involving blood sugars, e.g. galactose  [3]
 G01N 33/68
·  ·  ·  involving proteins, peptides or amino acids  [3]
 G01N 33/70
·  ·  ·  involving creatine or creatinine  [3]
 G01N 33/72
·  ·  ·  involving blood pigments, e.g. hemoglobin, bilirubin  [3]
 G01N 33/74
·  ·  ·  involving hormones  [3]
 G01N 33/80
·  ·  ·  involving blood groups or blood types  [3]
 G01N 33/82
·  ·  ·  involving vitamins  [3]
 G01N 33/84
·  ·  ·  involving inorganic compounds or pH  [3]
 G01N 33/86
·  ·  ·  involving blood coagulating time  [3]
 G01N 33/88
·  ·  ·  involving prostaglandins  [3]
 G01N 33/90
·  ·  ·  involving iron binding capacity of blood  [3]
 G01N 33/92
·  ·  ·  involving lipids, e.g. cholesterol  [3]
 G01N 33/94
·  ·  ·  involving narcotics  [3]
 G01N 33/96
·  ·  ·  involving blood or serum control standard  [3]
 G01N 33/98
·  ·  ·  involving alcohol, e.g. ethanol in breath  [4]
P:190 G01N 35/00
Automatic analysis not limited to methods or materials provided for in any single one of groups G01N 1/00-G01N 33/00; Handling materials therefor  [3]
 G01N 35/02
·  using a plurality of sample containers moved by a conveyer system past one or more treatment or analysis stations  [3]
 G01N 35/04
·  ·  Details of the conveyer system  [3]
 G01N 35/08
·  using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis  [3]
 G01N 35/10
·  Devices for transferring samples to, in, or from, the analysis apparatus, e.g. suction devices, injection devices  [6]
P:210 G01N 37/00
Details not covered by any other group of this subclass  [3]