B01D 25/12 Filter presses, i.e. of the plate or plate and frame type
Full Title
Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D29/39) > Filter presses, i.e. of the plate or plate and frame type
Filing statistics
CPC B01D 25/12 belongs to the parent subclass B01D, which recorded 535,388 patent applications worldwide between 2013 and 2023. Annual filings grew from 27,086 in 2013 to 52,287 in 2023 (+93%), peaking at 67,231 applications in 2020. The most active applicants in class B01 are SINOPEC (CHINA PETROCHEMICAL CORPORATION) (10,345 applications), CHINESE ACADEMY OF SCIENCES (8,352 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (5,134 applications).
Source: EPO PATSTAT, worldwide filings
6 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- 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 (B01D25/172, B01D25/176, B01D25/19 take precedence)
- B01D 25/164 Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates (B01D25/127, B01D25/172, B01D25/176, B01D25/19 take precedence)
- B01D 25/172 Plate spreading means (removal of filter cakes B01D25/32)
- 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 (B01D25/172, B01D25/176, B01D25/19 take precedence)
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