CPC Subgroup
B01D 39/02 Loose filtering material, e.g. loose fibres
Full Title
Filtering material for liquid or gaseous fluids > Loose filtering material, e.g. loose fibres
2 direct subcodes
Child Classifications
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- B01D 39/04 Organic material, e.g. cellulose, cotton
- B01D 39/06 Inorganic material, e.g. asbestos fibres, glass beads or fibres
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