C
SECTION C — CHEMISTRY AND METALLURGY
 C

Note(s)

Definitions for Section C:

  • Alkali metals: Li, Na, K, Rb, Cs, Fr
  • Alkaline earth metals: Ca, Sr, Ba, Ra
  • Lanthanides: elements with atomic numbers 57 to 71 inclusive
  • Rare earths: Sc, Y, Lanthanides
  • Actinides: elements with atomic numbers 89 to 103 inclusive
  • Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
  • Halogens: F, Cl, Br, I, At
  • Noble gases: He, Ne, Ar, Kr, Xe, Rn
  • Platinum group: Os, Ir, Pt, Ru, Rh, Pd
  • Noble metals: Ag, Au, Platinum group
  • Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
  • Heavy metals: metals other than light metals
  • Iron group: Fe, Co, Ni
  • Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
  • Metals: elements other than non-metals
  • Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

  
CHEMISTRY
 C12
BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
 C12

Note(s)

  1. In the field of sub-classes C12M-C12Q, in the absence of an indication to the contrary, an invention is classified in the last appropriate place. [3]
  2. Within this class, viruses, undifferentiated plant or animal cells, protozoa and unicellular algae are considered as micro-organisms. Also, sub-cellular parts, unless specifically provided for, are classified with the whole cell. [3]
  3. Within this class, non-obligatory classifications may be given as additional information relating to the micro-organisms used by means of the symbols of sub-class C12R[3]
 C12H
PASTEURISATION; STERILISATION; PRESERVATION; PURIFICATION; CLARIFICATION; AGEING
 C12H 1/00
Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages (simulating ageing by flavouring C12G 3/06)
 C12H 1/02
·  combined with removal of precipitate or added materials, e.g. adsorption material
 C12H 1/04
·  ·  with the aid of ion-exchange material or inert clarification material, e.g. adsorption material
 C12H 1/06
·  ·  Precipitation by physical means, e.g. by irradiation, vibrations
 C12H 1/08
·  ·  ·  by heating
 C12H 1/10
·  ·  Precipitation by chemical means
 C12H 1/12
·  without precipitation
 C12H 1/14
·  ·  with non-precipitating compounds, e.g. sulphiting; Sequestration, e.g. with chelate-producing compounds
 C12H 1/16
·  ·  by physical means, e.g. irradiation
 C12H 1/18
·  ·  ·  by heating
 C12H 1/20
·  ·  ·  ·  in containers allowing for expansion of the contents
 C12H 1/22
·  Ageing or ripening by storing, e.g. lagering of beer