CPC Subgroup Additional Only
B01D 2275/20 Shape of filtering material
Full Title
Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours > Shape of filtering material
8 direct subcodes
Child Classifications
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- B01D 2275/201 Conical shape
- B01D 2275/202 Disc-shaped filter elements
- B01D 2275/203 Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
- B01D 2275/204 Special shapes of loose filter materials
- B01D 2275/205 Rectangular shape
- B01D 2275/206 Special forms, e.g. adapted to a certain housing
- B01D 2275/207 Triangular shape
- B01D 2275/208 Oval shape
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