CPC Main Group
C08B 3/00 Preparation of cellulose esters of organic acids
Filing statistics
CPC C08B 3/00 belongs to the parent subclass C08B, which 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
9 direct subcodes
Child Classifications
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- C08B 3/02 Catalysts used for the esterification
- C08B 3/04 Cellulose formate
- C08B 3/06 Cellulose acetate
- C08B 3/08 of monobasic organic acids with three or more carbon atoms,
- C08B 3/12 of polybasic organic acids
- C08B 3/14 in which the organic acid residue contains substituents, e.g. NH2, Cl
- C08B 3/16 Preparation of mixed organic cellulose esters
- C08B 3/20 Esterification with maintenance of the fibrous structure of the cellulose (surface esterification of textiles D06M13/00)
- C08B 3/22 Post-esterification treatments, including purification
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