B01D 24/20 the filtering material being provided in an open container
Introduced: January 1990
Full Title
Full titles differ between systems:
Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof > with the filter bed stationary during the filtration > the filtering material being provided in an open container
Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (B01D27/02 takes precedence) > with the filter bed stationary during the filtration > the filtering material being provided in an open container
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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- B01D 24/22 Downward filtration, the filter material being supported by pervious surfaces since 1990 IPC+CPC Available in IPC and CPC
- B01D 24/24 Downward filtration, the container having distribution or collection headers or pervious conduits since 1990 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B01,2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
- CHINESE ACADEMY OF SCIENCES 11,733
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
- LG CHEM KR 3,367
- PETROCHINA COMPANY 3,224
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
- ZHEJIANG UNIVERSITY 2,890
- MANN + HUMMEL DE 2,740
- JOHNSON MATTHEY GB 2,534
- SAUDI ARABIAN OIL COMPANY SA 2,527
Top Applicants (CPC)
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