B01D 29/00 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
Introduced: September 1968
Title
Titles differ between systems:
IPC: Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups; Filtering elements therefor
CPC: Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
Full Title
Full titles differ between systems:
Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups; Filtering elements therefor
Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
Of 15 combined children, 12 exist in both systems.
3 codes are CPC-only extensions.
5 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- B01D 29/01 with flat filtering elements (B01D29/39 takes precedence) since 1990 +4 CPC IPC+CPC Available in IPC and CPC
- B01D 29/09 with filtering bands, e.g. movable between filtering operations since 1990 +2 CPC IPC+CPC Available in IPC and CPC
- B01D 29/11 with bag, cage, hose, tube, sleeve or like filtering elements since 1990 +4 CPC IPC+CPC Available in IPC and CPC
- B01D 29/39 with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- B01D 29/44 Edge filtering elements, i.e. using contiguous impervious surfaces since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- B01D 29/50 with multiple filtering elements, characterised by their mutual disposition (B01D29/39 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
- B01D 29/60 integrally combined with devices for controlling the filtration since 1990 +5 CPC IPC+CPC Available in IPC and CPC
- B01D 29/62 Regenerating the filter material in the filter (devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D35/12) since 1990 IPC+CPC Available in IPC and CPC
- B01D 29/76 Handling the filter cake in the filter for purposes other than for regenerating (B01D29/94 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
- B01D 29/96 in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters (B01D29/09, B01D29/70 take precedence) since 1990 +1 CPC 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