IPC Main Group
B01D 29/00 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups; Filtering elements therefor
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- Subclass:
- SEPARATION
12 direct subcodes
Child Classifications
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- B01D 29/01 with flat filtering elements
- B01D 29/085 Funnel filters; Holders therefor
- B01D 29/09 with filtering bands, e.g. movable between filtering operations
- B01D 29/11 with bag, cage, hose, tube, sleeve or like filtering elements
- B01D 29/39 with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
- B01D 29/44 Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D 29/5 with multiple filtering elements, characterised by their mutual disposition
- B01D 29/6 integrally combined with devices for controlling the filtration
- B01D 29/62 Regenerating the filter material in the filter
- B01D 29/76 Handling the filter cake in the filter for purposes other than for regenerating
- B01D 29/88 having feed or discharge devices
- 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
Top Applicants
Top 10 applicants by patent filingsfor 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