C08B POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
Introduced: September 1968
Description
C08B encompasses polysaccharides and their chemical derivatives, including natural polymers such as cellulose, starch, gums, and glycans, as well as modified forms obtained through chemical treatment, cross-linking, or substitution. This subclass covers both the isolation and purification of polysaccharides from natural sources and their synthetic preparation, chemical working-up, and formulation into composition-based products. Typical applications include food additives, thickening agents, biodegradable polymers, pharmaceutical excipients, and industrial binders. Adjacent classes cover other macromolecular compounds (C08C-C08L) and specific processing aspects covered under C08H and related subdivisions.
Title
Titles differ between systems:
IPC: POLYSACCHARIDES; DERIVATIVES THEREOF
CPC: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
Full Title
Full titles differ between systems:
POLYSACCHARIDES; DERIVATIVES THEREOF
POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
Additional Content IPC
Glossary
Saccharide radical saccharide radicals Saccharide radicals are monosaccharide, i.e. carbohydrate repeating units. Glycosidic linkage glycosidic linkages A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. A glycosidic bond is formed between the hemiacetal group of a saccharide (or a molecule derived from a saccharide) and the hydroxyl group of some organic compound. If the group attached to the carbohydrate residue is not another saccharide it is referred to as an aglycone. If it is another saccharide, the resulting units can be termed as being at the reducing end or the terminal end of the structure. The reducing end of the di- or polysaccharide is towards the last anomeric carbon of the structure, and the terminal end is in the opposite direction. One distinguishes between α- and β-glycosidic bonds based on the relative stereochemistry of the anomeric position and the stereocentre furthest from C1 in the saccharide. In D-hexose sugars in their pyranose forms, an α-glycosidic bond is formed in an axial orientation, whereas a β-glycosidic bond will be oriented equatorially.
Limiting references
Mono-, di- or oligo-saccharides with five or less saccharide radicals Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a polysaccharide Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a cellulose or derivative thereof Grafted or block polysaccharides obtained by reaction of a polymer with a polysaccharide Fermentation or enzyme-using processes to synthesize polysaccharides Production of cellulose
Application references
Application of polysaccharide compositions as pesticides, herbicides, biocides or disinfectants Treatment or baking of flour or dough Animal feeding stuffs Layered products Application of polysaccharide compositions as explosive compositions Application of polysaccharide compositions for drilling or treating of boreholes or wells Detergents containing polysaccharide compositions
IPC and CPC are identically structured here. All 15 subcodes exist in both systems.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C08B 1/00 Preparatory treatment of cellulose for making derivatives thereof +2 CPC IPC+CPC Available in IPC and CPC
- C08B 15/00 Preparation of other cellulose derivatives or modified cellulose +1 CPC IPC+CPC Available in IPC and CPC
- C08B 17/00 Apparatus for esterification or etherification of cellulose IPC+CPC Available in IPC and CPC
- C08B 30/00 Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin since 1985 IPC+CPC Available in IPC and CPC
- C08B 31/00 Preparation of derivatives of starch (derivatives of amylose C08B33/00; derivatives of amylopectin C08B35/00) since 1974 +1 CPC IPC+CPC Available in IPC and CPC
- C08B 37/00 Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof (cellulose D21; ) since 1974 +3 CPC −6 IPC IPC+CPC Available in IPC and CPC
- C08B 7/00 Preparation of cellulose esters of both organic and inorganic acids IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C08,2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 14,262
- DOW GLOBAL TECHNOLOGIES US 12,486
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,858
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,877
- CHINESE ACADEMY OF SCIENCES 6,993
- FUJIFILM JP 5,049
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 4,923
- SHIN-ETSU CHEMICAL COMPANY JP 4,517
- BOREALIS AT 4,213
- ARKEMA FR 4,098
Top Applicants (CPC)
Class C08,2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 15,432
- DOW GLOBAL TECHNOLOGIES US 14,214
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 11,155
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,455
- FUJIFILM JP 6,178
- CHINESE ACADEMY OF SCIENCES 5,569
- SHIN-ETSU CHEMICAL COMPANY JP 5,506
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,443
- TORAY INDUSTRIES JP 4,635
- NITTO DENKO CORPORATION JP 4,620