United States Patent and Trademark Office

Outline		Indent Level
Color		Curly Brackets (indicating CPC extensions to IPC)

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	CPC	COOPERATIVE PATENT CLASSIFICATION

C08H

DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS (polysaccharides C08B; natural rubber C08C; natural resins or their derivatives C09F ; bituminous materials C10)

Guide Heading:

Preparation

C08H 1/00

Macromolecular products derived from proteins (food proteins A23; glue, gelatine C09H)

C08H 1/02

Protein-aldehyde condensates

C08H 1/04

. .

Casein-aldehyde condensates

C08H 1/06

derived from horn, hoofs, hair, skin or leather

C08H 3/00

Vulcanised oils, e.g. factice

C08H 6/00

Macromolecular compounds derived from lignin,

{

e.g. tannins, humic acids

}

NOTE

Attention is drawn to the following place, which could be of interest for search: - Lignin or lignin derivatives, C07G 1/00]

C08H 8/00

Macromolecular compounds derived from lignocellulosic materials

{

(pretreatment thereof B27N)

}

C08H 99/00

Subject matter not provided for in other groups of this subclass,

{

e.g. flours, kernels

}