|  | 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

|  | C08 |
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON (production of artificial threads, fibres, bristles or ribbons Fulltext... Hierarchy... Expanded...D01)

|  | C08B |
POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages Fulltext... Hierarchy... Expanded...C07H; fermentation or enzyme-using processes Fulltext... Hierarchy... Expanded...C12P 19/00; production of starch, sugar, or like carbohydrates Fulltext... Hierarchy... Expanded...C13; production of cellulose Fulltext... Hierarchy... Expanded...D21)

|  | C08C |
TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

|  | C08C |
Note(s) This sub-class includes: processes directed to natural rubber or to conjugated diene rubbers (synthesis thereof Fulltext... Hierarchy... Expanded...C08F); processes directed to rubbers in general (to a specific rubber, other than provided for by (a) above, Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F-C08H). [2]

|  | C08F |
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS [2]

|  | C08F |
Note(s) Inventions dealing with macromolecular compounds or their preparation are classified in the groups for the type of compound prepared. The processes of preparation are secondarily classified in the groups for the types of reactions employed when such groups exist. General processes for the preparation of macromolecular compounds according to more than one main group are classified in the groups for the processes employed (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 2/00-C08F 8/00). [2] For the purpose of this sub-class, boron and silicon are considered as metals. Inventions relating to both homopolymers and copolymers are classified in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 10/00-C08F 38/00. Inventions limited to homopolymers are classified only in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 110/00-C08F 138/00, whilst those limited to copolymers are classified only in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 210/00-C08F 246/00. In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 210/00-C08F 238/00 a copolymer is classified according to the major monomeric component, in the absence of an indication to the contrary. In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 210/00-C08F 297/00 it is desirable to add, in conformity with paragraph 80 of the Guide, after the double oblique stroke the symbols relating to complementary information concerning individual constituents of a technical subject which is already classified as such. This complementary information concerns the indication of the additional monomeric components by using the symbols of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F 210/00-C08F 238/00 in cases where no specific sub-groups defined by said additional monomeric components are present. For the purpose of this sub-class, the term "aliphatic radical" means an acyclic or a non-aromatic carbocyclic carbon skeleton which is considered to be terminated by every bond to: an element other than carbon a carbon atom having a double bond to one atom other than carbon an aromatic carbocyclic ring or a heterocyclic ring. Examples: Polymers of CH2=CH—O—H2—CH2—NH—COO—CH2—CH2—OH are classified in group Fulltext... Hierarchy... Expanded...C08F 16/28 are classified in group Fulltext... Hierarchy... Expanded...C08F 16/36 are classified in group Fulltext... Hierarchy... Expanded...C08F 12/18. In this sub-class, in the absence of an indication to the contrary, a catalyst or a polymer is classified in the last appropriate place.

|  | C08G |
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS [2]

|  | C08G |
Note(s) In the absence of an indication to the contrary, an invention is classified in the last appropriate place within each main group. [2] In this sub-class, group Fulltext... Hierarchy... Expanded...C08G 18/00 takes precedence. A second classification should be given if the polymers are obtained by reactions forming specific linkages for which an appropriate group is provided. [2] In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08G 61/00-C08G 79/00, in the absence of an indication to the contrary, macromolecular compounds obtained by reactions forming two different linkages in the main chain are classified only according to the linkage present in excess. [2]

|  | C08H |
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS (polysaccharides Fulltext... Hierarchy... Expanded...C08B; natural rubber Fulltext... Hierarchy... Expanded...C08C)

|  | C08J |
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT (layered products, manufacture thereof Fulltext... Hierarchy... Expanded...B32B) [2]

|  | C08J |
Note(s) In this sub-class, in the absence of an indication to the contrary, an invention is classified in the last appropriate place. [2]

|  | C08K |
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS (pesticides, herbicides Fulltext... Hierarchy... Expanded...A01N; pharmaceuticals, cosmetics Fulltext... Hierarchy... Expanded...A61K; explosives Fulltext... Hierarchy... Expanded...C06B; paints, inks, varnishes, dyes, polishes, adhesives Fulltext... Hierarchy... Expanded...C09; lubricants Fulltext... Hierarchy... Expanded...C10M; detergents Fulltext... Hierarchy... Expanded...C11D; artificial filaments or fibres per se Fulltext... Hierarchy... Expanded...D01F; textile treating compositions Fulltext... Hierarchy... Expanded...D06) [2]

|  | C08K |
Note(s) In this sub-class, an ingredient is classified in the last appropriate place. [2] Ammonium salts are classified in the same way as metal salts. [2] In this sub-class it is desirable to add, in conformity with paragraph 61 of the Guide, after the double oblique stroke the symbols relating to complementary information concerning individual constituents of a technical subject which is already classified as such. This complementary information concerns the indication of additional compounding ingredients. [2]

|  | C08L |
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (pesticides, herbicides Fulltext... Hierarchy... Expanded...A01N; pharmaceuticals, cosmetics Fulltext... Hierarchy... Expanded...A61K; explosives Fulltext... Hierarchy... Expanded...C06B; paints, inks, varnishes, dyes, polishes, adhesives Fulltext... Hierarchy... Expanded...C09; lubricants Fulltext... Hierarchy... Expanded...C10M; detergents Fulltext... Hierarchy... Expanded...C11D; artificial filaments or fibres Fulltext... Hierarchy... Expanded...D01F; textile treating compositions Fulltext... Hierarchy... Expanded...D06) [2]

|  | C08L |
Note(s) In this sub-class, compositions are classified according to the mutual proportions by weight of only the macromolecular constituents. [2] Compositions are classified according to the macromolecular constituent or constituents present in the highest proportion; if all these constituents are present in equal proportions the composition is classified according to each of these constituents. [2] In this sub-class it is desirable to add, in conformity with paragraph 61 of the Guide, after the double oblique stroke the symbols relating to complementary information concerning individual constituents of a technical subject unit which is already classified as such. This complementary information concerns the indication of the additional macromolecular constituents of the composition. [2] The term "rubber" includes: natural or conjugated diene rubbers; rubber in general (for a specific rubber, other than a natural rubber or a conjugated diene rubber, see the group provided for compositions of such macromolecular compounds). [2]