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
 C10
PETROLEUM, GAS AND COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
 C10B
DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, AND SIMILAR MATERIALS (cracking oils C10G)

 C10C
WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID

 C10F
CUTTING, DRYING, AND WORKING-UP OF PEAT

 C10G
CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES FROM MATERIALS OTHER THAN HYDROCARBONS, e.g. BY DESTRUCTIVE HYDROGENATION cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to well-defined hydrocarbons C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES (inhibiting corrosion or incrustation in general C23F)
 C10G

Note(s)

  1. In this sub-class, in the absence of an indication to the contrary, an invention is classified in the last appropriate place. [3]
  2. Groups C10G 9/00-C10G 49/00 are limited to inventions dealing with only one process step. Combined or multi-step processes are covered by groups C10G 51/00-C10G 69/00[3]
  3. Refining or recovery of mineral waxes is covered by group C10G 73/00[3]
  4. The expressions "in the presence of hydrogen" and "in the absence of hydrogen" mean treatments in which hydrogen, in free form or as hydrogen generating compounds, is added, or not added, respectively. [3]
  5. The term "hydrotreatment" is used for conversion processes as defined in group C10G 45/00 or group C10G 47/00[3]
  6. The expression "hydrocarbon oils" comprises mixtures of hydrocarbons such as tar oils or mineral oils. [3]

 C10H
PRODUCTION OF ACETYLENE BY WET METHODS; ITS PURIFICATION

 C10J
PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B); CARBURETTING AIR OR OTHER GASES

 C10K
PURIFYING OR MODIFYING THE CHEMICAL COMPOSITIONS OF COMBUSTIBLE TECHNICAL GASES CONTAINING CARBON MONOXIDE

 C10L
FUELS NOT OTHERWISE PROVIDED FOR (fuels for generating pressure gas, e.g. for rockets, C06D 5/00; candles C11C; nuclear fuel G21C 3/00); ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS

 C10M
LUBRICATING COMPOSITIONS (well drilling compositions C09K 7/00); THE USE AS LUBRICANTS OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A COMPOSITION (use of particular substances in particular apparatus or conditions, see F16N or the relevant class for the application, e.g. A21D 8/08, B21C 9/00, B29C 1/04, C03B 40/00)
 C10M

Note(s)

  1. In this sub-class, the terms "lubricants" and "lubricating compositions" are intended to cover also cutting oils, hydraulic fluids, metal drawing compositions, mould release agents, textile lubricants, flushing oils, slushing oils, insulating oils, and the like.
  2. In this sub-class, in the absence of an indication to the contrary: [3]
    1. a compound is classified in the last appropriate place. Salts of a compound are classified as that compound, e.g. lead-naphthenate is classified in C10M 1/24 and not in C10M 1/54[3]
    2. if more than one ingredient is essential, a mixture is classified at least according to the essential ingredient which belongs to the last appropriate place in the sequence of substances. [3]