CPC Main Group
B01D 35/00 Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
15 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- B01D 35/02 Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, (B01D35/05 takes precedence; )
- B01D 35/05 Floating filters
- B01D 35/06 Filters making use of electricity or magnetism (ultrafiltration, microfiltration B01D61/14; electrodialysis, electro-osmosis B01D61/42; devices comprising filters and magnetic separators B03C1/30)
- B01D 35/10 Brush filters
- B01D 35/12 Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
- B01D 35/14 Safety devices specially adapted for filtration (preventing or minimising fires or explosions A62C); Devices for indicating clogging (incorporated in a throw-away filter B01D27/10)
- B01D 35/16 Cleaning-out devices
- B01D 35/18 Heating or cooling the filters
- B01D 35/20 Vibrating the filters (regenerating filter material by vibrations in filters with stationary filtering elements B01D29/72; discharging the filter cake by vibrations in filters with moving filtering elements B01D33/54, B01D33/76)
- B01D 35/22 Directing the mixture to be filtered on to the filters in a manner to clean the filters
- B01D 35/24 Providing loose granular material to scratch the filters clean
- B01D 35/26 Filters with built-in pumps
- B01D 35/28 Strainers not provided for elsewhere
- B01D 35/30 Filter housing constructions
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