IPC 7 English version G01N 22/00-G01N 27/92

IPC ⁷ English version

G01N 11/00 - G01N 21/958

G01N02200-G01N02792

G01N 29/00 - G01N 37/00

SECTION G – PHYSICS

G 01

MEASURING (counting G06M); TESTING

G 01 N

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)

22/

Investigating or analysing materials by the use of microwaves (G01N 3/00 to G01N 17/00, G01N 24/00 take precedence) [3]

22/

Investigating the presence of flaws [3]

22/

Investigating moisture content [3]

23/

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 to 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)

23/

by transmitting the radiation through the material

23/

and forming a picture (electron microscopes H01J)

23/

using neutrons [3]

23/

and measuring the absorption

23/

using electric detection means

23/

083

the radiation being X-rays (G01N 23/10 to G01N 23/18 take precedence) [5]

23/

087

using polyenergetic X-rays [5]

23/

the radiation being neutrons [3]

23/

the material being confined in a container (G01N 23/09 takes precedence) [3]

23/

the material being a flowing fluid or a flowing granular solid (G01N 23/09 takes precedence) [3]

23/

specially adapted for controlling or monitoring operations or for signalling

23/

the material being a moving sheet (G01N 23/09, G01N 23/18 take precedence) [3]

23/

Investigating the presence of flaws or inclusions (G01N 23/09 takes precedence) [3,5]

23/

by using diffraction of the radiation, e.g. for investigating crystal structure; by using reflection of the radiation

23/

201

by measuring small-angle scattering [2]

23/

202

using neutrons [3]

23/

203

by measuring back scattering [2]

23/

204

using neutrons [3]

23/

205

by means of diffraction cameras (G01N 23/201 takes precedence) [2]

23/

206

the radiation being neutrons [3]

23/

207

by means of diffractometry using detectors, e.g. using an analysing crystal or a crystal to be analysed in a central position and one or more displaceable detectors in circumferential positions (G01N 23/201 takes precedence; spectrometry of detected or measured radiation intensity G01T 1/36) [2]

23/

by measuring secondary emission [2]

23/

221

by activation analysis [2]

23/

222

using neutrons [3]

23/

223

by irradiating the sample with X-rays and by measuring X-ray fluorescence [2]

23/

225

using electron or ion microprobe (electron or ion-beam tubes for microprobe analysis H01J 37/00) [2]

23/

227

by measuring photoelectric effect, e.g. Auger electrons [2]

24/

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]

24/

by using nuclear magnetic resonance (G01N 24/12 takes precedence) [3]

24/

by using electron paramagnetic resonance (G01N 24/12 takes precedence) [3]

24/

by using double resonance [3]

24/

by using cyclotron resonance [3]

25/

Investigating or analysing materials by the use of thermal means (G01N 3/00 to G01N 23/00 take precedence)

25/

by investigating changes of state or changes of phase; by investigating sintering

25/

of melting point; of freezing point; of softening point

25/

Analysis by measuring change of freezing point

25/

of boiling point

25/

Analysis by measuring change of boiling point

25/

of critical point; of other phase change

25/

by using distillation, extraction, sublimation, condensation, freezing, or crystallisation (G01N 25/02 takes precedence)

25/

by investigating thermal coefficient of expansion

25/

by investigating thermal conductivity (by calorimetry G01N 25/20; by measuring change of resistance of an electrically-heated body G01N 27/18)

25/

by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity

25/

on combustion or catalytic oxidation, e.g. of components of gas mixtures

25/

using combustion tubes, e.g. for micro-analysis

25/

using combustion with oxygen under pressure, e.g. in bomb calorimeter

25/

the rise in temperature of the gases resulting from combustion being measured directly

25/

using electric temperature-responsive elements

25/

using thermoelectric elements

25/

using mechanical temperature-responsive elements, e.g. bimetallic

25/

for investigating the composition of gas mixtures

25/

using the melting or combustion of a solid

25/

the heat developed being transferred to a flowing fluid

25/

continuously

25/

the heat developed being transferred to a fixed quantity of fluid

25/

for investigating the composition of gas mixtures

25/

on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation

25/

by investigating flash-point; by investigating explosibility

25/

by determining flash-point of liquids

25/

by determining explosibility

25/

by investigating moisture content

25/

by measuring changes of properties of the material due to heat, cold, or expansion

25/

for determining the wetness of steam

25/

by psychrometric means, e.g. wet-and-dry-bulb thermometers

25/

using electric temperature-responsive elements

25/

by investigating dew-point

25/

by varying the temperature of a condensing surface

25/

by varying the temperature of the material, e.g. by compression, by expansion

25/

Investigating presence of flaws (by investigating thermal conductivity G01N 25/18)

27/

Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (G01N 3/00 to G01N 25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)

27/

by investigating impedance

27/

by investigating resistance

27/

of a liquid (involving electrolysis G01N 27/26; involving polarography G01N 27/48; measuring electric resistance of fluids G01R 27/22)

27/

Construction of measuring vessels; Electrodes therefor [2]

27/

which is flowing continuously

27/

Investigation or analysis specially adapted for controlling or monitoring operations or for signalling (regulating G05D)

27/

of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid

27/

of an electrically-heated body in dependence upon change of temperature

27/

caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas

27/

caused by changes in the thermal conductivity of a surrounding material to be tested (G01N 27/20 takes precedence)

27/

Investigating the presence of flaws

27/

by investigating capacitance

27/

Investigating the presence of flaws

27/

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 33/561; electrochemical processes or apparatus in general B01J; standard cells H01M 6/28) [5]

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]

27/

Electrolytic cell components

27/

Electrodes, e.g. test electrodes; Half-cells (G01N 27/414 takes precedence) [5]

27/

Half-cells with permeable membranes, e.g. semi-porous or perm-selective membranes [5]

27/

Calomel electrodes

27/

327

Biochemical electrodes [5]

27/

333

Ion-selective electrodes or membranes (glass electrodes G01N 27/36) [5]

27/

Dropping-mercury electrodes

27/

Glass electrodes

27/

Cleaning of electrodes

27/

Semi-permeable membranes or partitions

27/

401

Salt-bridge leaks; Liquid junctions [5]

27/

403

Cells and electrode assemblies [5]

27/

404

Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid [5]

27/

406

Cells and probes with solid electrolytes [5]

27/

407

for investigating or analysing gases [5]

27/

409

Oxygen concentration cells [5]

27/

Oxygen pumping cells [5]

27/

411

for investigating or analysing of liquid metals [5]

27/

413

Concentration cells using liquid electrolytes [5]

27/

414

Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS [5]

27/

416

Systems (G01N 27/27 takes precedence) [5]

27/

417

using cells and probes with solid electrolytes [5]

27/

419

Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells [5]

27/

Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte [5]

27/

using electrolysis to generate a reagent, e.g. for titration [5]

27/

447

using electrophoresis [5]

27/

453

Cells therefor [5]

27/

using polarography, i.e. measuring changes in current under a slowly-varying voltage

27/

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]

27/

by investigating electrostatic variables (by investigating capacitance G01N 27/22)

27/

Investigating the presence of flaws [3]

27/

by investigating the ionisation of gases; by investigating electric discharges, e.g. emission of cathode (particle spectrometers H01J 49/00)

27/

using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber

27/

and measuring current or voltage

27/

using electric discharge to ionise a gas

27/

and measuring current or voltage

27/

by investigating magnetic variables

27/

of fluids (G01N 24/00 takes precedence)

27/

by investigating susceptibility

27/

for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material

27/

for investigating the presence of flaws

27/

by investigating stray magnetic fields [3]

27/

by applying magnetic powder or magnetic ink [3]

27/

using magnetographic methods [3]

27/

using probes [3]

27/

using eddy currents [3]

27/

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]

G01N 11/00 - G01N 21/958

G01N 29/00 - G01N 37/00