CPC Subgroup Additional Only
B01D 2239/12 Special parameters characterising the filtering material
Full Title
Aspects relating to filtering material for liquid or gaseous fluids > Special parameters characterising the filtering material
11 direct subcodes
Child Classifications
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- B01D 2239/1208 Porosity
- B01D 2239/1216 Pore size
- B01D 2239/1225 Fibre length
- B01D 2239/1233 Fibre diameter
- B01D 2239/1241 Particle diameter
- B01D 2239/125 Size distribution
- B01D 2239/1258 Permeability
- B01D 2239/1266 Solidity
- B01D 2239/1275 Stiffness
- B01D 2239/1283 Stability index
- B01D 2239/1291 Other parameters
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