CPC Main Group
B01D 25/00 Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D29/39)
9 direct subcodes
Child Classifications
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- B01D 25/02 in which the elements are pre-formed independent filtering units, e.g. modular systems
- B01D 25/12 Filter presses, i.e. of the plate or plate and frame type
- B01D 25/22 Cell-type filters
- B01D 25/28 Leaching or washing filter cakes in the filter
- B01D 25/30 Feeding devices
- B01D 25/32 Removal of the filter cakes
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