IPC Subgroup
B01D 25/12 Filter presses, i.e. of the plate or plate and frame type
Introduced: September 1968
Last revised: January 2006
Full Title
Filters formed by clamping together several filtering elements or parts of such elements > Filter presses, i.e. of the plate or plate and frame type
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- Subclass:
- SEPARATION
Related Keywords
FILTER(S) presses
6 direct subcodes
Child Classifications
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- B01D 25/127 with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
- B01D 25/164 Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
- B01D 25/172 Plate spreading means
- B01D 25/176 attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates
- B01D 25/19 Clamping means for closing the filter press, e.g. hydraulic jacks
- B01D 25/21 Plate and frame presses
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