CPC Subgroup
B01J 41/12 Macromolecular compounds
Full Title
Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties (ion-exchange chromatography processes B01D15/36) > Use of material as anion exchangers; Treatment of material for improving the anion exchange properties > Macromolecular compounds
3 direct subcodes
Child Classifications
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- B01J 41/13 obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
- B01J 41/14 obtained by reactions only involving unsaturated carbon-to-carbon bonds
- B01J 41/16 Cellulose or wood; Derivatives thereof
Top Applicants
Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,345
- CHINESE ACADEMY OF SCIENCES 8,352
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,134
- LG CHEM KR 4,290
- SAUDI ARABIAN OIL COMPANY SA 3,444
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,417
- DOW GLOBAL TECHNOLOGIES US 3,195
- MANN + HUMMEL DE 2,822
- JOHNSON MATTHEY GB 2,802
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,737