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)
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.
Filing statistics
CPC subclass C08B recorded 44,442 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,044 in 2013 to 3,688 in 2023 (+21%), peaking at 5,084 applications in 2018. The most active applicants in class C08 are LG CHEM (15,432 applications), DOW GLOBAL TECHNOLOGIES (14,214 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (11,155 applications).
Source: EPO PATSTAT, worldwide filings
15 direct subcodes
Child Classifications
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- C08B 1/00 Preparatory treatment of cellulose for making derivatives thereof
- C08B 11/00 Preparation of cellulose ethers
- C08B 13/00 Preparation of cellulose ether-esters
- C08B 15/00 Preparation of other cellulose derivatives or modified cellulose
- C08B 16/00 Regeneration of cellulose
- C08B 17/00 Apparatus for esterification or etherification of cellulose
- C08B 3/00 Preparation of cellulose esters of organic acids
- C08B 30/00 Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B 31/00 Preparation of derivatives of starch (derivatives of amylose C08B33/00; derivatives of amylopectin C08B35/00)
- C08B 33/00 Preparation of derivatives of amylose
- C08B 35/00 Preparation of derivatives of amylopectin
- C08B 37/00 Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof (cellulose D21; )
- C08B 5/00 Preparation of cellulose esters of inorganic acids
- C08B 7/00 Preparation of cellulose esters of both organic and inorganic acids
- C08B 9/00 Cellulose xanthate; Viscose
Top Applicants
Top 10 applicants by patent filingsfor 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