|  | C |
SECTION C — CHEMISTRY AND METALLURGY

CHEMISTRY

|  | C01 |
INORGANIC CHEMISTRY (obtaining metal compounds by metallurgical processes Fulltext... Hierarchy... Expanded...C21B, Fulltext... Hierarchy... Expanded...C22B)

|  | C02 |
TREATMENT OF WATER, WASTE WATER AND SEWAGE (distilling, filtering, separating Fulltext... Hierarchy... Expanded...B01)

|  | C03 |
GLASS; MINERAL AND SLAG WOOL

|  | C04 |
CEMENTS; CERAMICS, etc.; SOUND OR THERMAL INSULATING MATERIALS

|  | C04 |
Note(s) This class does not include mechanical features provided for elsewhere, e.g. mechanical working Fulltext... Hierarchy... Expanded...B28, mechanical aspects of coating, e.g. applying glazes by brushing, dipping, spraying, Fulltext... Hierarchy... Expanded...B44, kilns Fulltext... Hierarchy... Expanded...F27.

|  | C05 |
MANUFACTURE OF FERTILISERS

|  | C05 |
Note(s) An ingredient in a mixture of fertilisers, or a single fertiliser which contains more than one of the chemical elements on which the division into sub-classes is based, is classified only in the first of the appropriate sub-classes. Thus, a nitrophosphate or an ammoniated superphosphate is classified in Fulltext... Hierarchy... Expanded...C05B but not in Fulltext... Hierarchy... Expanded...C05C, magnesium phosphate is classified in Fulltext... Hierarchy... Expanded...C05B but not in Fulltext... Hierarchy... Expanded...C05D, and calcium cyanamide in Fulltext... Hierarchy... Expanded...C05C but not in Fulltext... Hierarchy... Expanded...C05D. When classifying a mixture of different fertilisers, or fertilisers with non-fertilisers the symbols appropriate to each separate ingredient of the mixture should be shown after the symbol appropriate to the mixture, in the manner indicated in para. 61 of the Guide. For example a mixture of Thomas phosphate with an organic phosphatic fertiliser would bear symbols Fulltext... Hierarchy... Expanded...C05B 21/00 // Fulltext... Hierarchy... Expanded...C05B 5/00, Fulltext... Hierarchy... Expanded...C05B 15/00; a mixture of Thomas phosphate sodium nitrate, and a potassium compound, the symbol Fulltext... Hierarchy... Expanded...C05G 1/04 // Fulltext... Hierarchy... Expanded...C05B 5/00; Fulltext... Hierarchy... Expanded...C05C 5/02; Fulltext... Hierarchy... Expanded...C05D 1/00; a mixture of organic phosphatic fertiliser with phenol (as a pesticide) the symbols Fulltext... Hierarchy... Expanded...C05G 3/02 // Fulltext... Hierarchy... Expanded...C05B 15/00; Fulltext... Hierarchy... Expanded...A01N 9/26; and a mixture of urea-formaldehyde fertilising condensate with a particular alkyl sulphonate as wetting agent, the symbols Fulltext... Hierarchy... Expanded...C05G 3/06 // Fulltext... Hierarchy... Expanded...C05C 9/02; Fulltext... Hierarchy... Expanded...B01F 17/02. Insignificant amounts, e.g. of impurities in a fertiliser, are disregarded.

|  | C06 |
EXPLOSIVES; MATCHES

|  | C07 |
ORGANIC CHEMISTRY (such compounds as the oxides, sulphides, and oxysulphides of carbon, cyanogen, phosgene, hydrocyanic acid and salts thereof Fulltext... Hierarchy... Expanded...C01; macromolecular compounds Fulltext... Hierarchy... Expanded...C08; dyes Fulltext... Hierarchy... Expanded...C09; fermentation products Fulltext... Hierarchy... Expanded...C12)

|  | C07 |
Note(s) Salts of a compound, unless specifically provided for, are classified as that compound, e.g. aniline hydrochloride is classified as containing carbon, hydrogen and nitrogen only (in Fulltext... Hierarchy... Expanded...C07C 87/52), sodium oxalate is classified as oxalic acid (in Fulltext... Hierarchy... Expanded...C07C 55/06), and a mercaptide is classified as the mercaptan. Metal chelates are dealt with in the same way. Similarly, metal alcoholates and metal phenates are classified in Fulltext... Hierarchy... Expanded...C07C and not in Fulltext... Hierarchy... Expanded...C07F— the alcoholates in Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C07C 31/28-C07C 31/32 and the phenates as the corresponding phenols in Fulltext... Hierarchy... Expanded...C07C 39/00. In the absence of an indication to the contrary, and with the exception referred to below, a compound is always classified in the last appropriate place in the classification system, e.g. a compound containing an acyclic chain and a heterocyclic ring is classified only as a heterocyclic compound, and a sterol is classified only as a cyclopentanophenanthrene compound. In general, and in the absence of an indication to the contrary (such as groups Fulltext... Hierarchy... Expanded...C07C 59/24, Fulltext... Hierarchy... Expanded...C07C 59/26), the terms "acyclic" and "aliphatic" are used to describe compounds in which there is no ring; and, if a ring were present, the compound would be taken by the "last place" rule to a later group for cycloaliphatic or aromatic compounds, if such a group exists. Where a compound or an entire group of compounds exists in tautomeric forms, it is classified as though existing in the form which is classified last in the system, unless the other form is specifically mentioned earlier in the system. Albumens, proteins, alkaloids of unknown structure, glucosides of unknown structure are examples of compounds to be found unter Fulltext... Hierarchy... Expanded...C07G. Inventions dealing with the preparation of chemical compounds might be classified both according to the type of reaction employed and according to the type of compound prepared, if suitable groups or sub-groups exits.

|  | C08 |
MACROMOLECULAR COMPOUNDS; THEIR PREPARATION AND CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON (production of cellulose Fulltext... Hierarchy... Expanded...D21; production of starch, sugar and like carbohydrates Fulltext... Hierarchy... Expanded...C13; explosive compositions Fulltext... Hierarchy... Expanded...C06; paints, lacquers, inks Fulltext... Hierarchy... Expanded...C09D; lubricating compositions Fulltext... Hierarchy... Expanded...C10M; production of artificial threads, fibres, bristles, and ribbons, including compositions therefor Fulltext... Hierarchy... Expanded...D01; textile-treating compositions Fulltext... Hierarchy... Expanded...D06)

|  | C09 |
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; MISCELLANEOUS COMPOSITIONS; MISCELLANEOUS APPLICATIONS OF MATERIALS

|  | C10 |
PETROLEUM, GAS AND COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT

|  | C11 |
ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES (edible oil or fat compositions Fulltext... Hierarchy... Expanded...A23)

|  | C12 |
FERMENTATION INDUSTRY; BEER; SPIRITS; WINE; VINEGAR; YEAST

|  | C13 |
SUGAR AND STARCH INDUSTRY

|  | C14 |
SKINS; HIDES; PELTS; LEATHER

METALLURGY

|  | C21 |
METALLURGY OF IRON

|  | C22 |
METALLURGY (of iron Fulltext... Hierarchy... Expanded...C21); FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR OF NON-FERROUS METALS

|  | C23 |
WORKING AND TREATMENT OF METALS, OTHER THAN BY MECHANICAL MEANS; COVERING MATERIALS WITH METALS (decorating textiles by metallising Fulltext... Hierarchy... Expanded...D06Q 1/04); INHIBITING CORROSION OR INCRUSTATION IN GENERAL