B01D 46/66 Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence)
Introduced: January 2022
Title
Titles differ between systems:
IPC: Regeneration of the filtering material or filter elements inside the filter
CPC: Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence)
Full Title
Full titles differ between systems:
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours > Regeneration of the filtering material or filter elements inside the filter
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours (filtering elements B01D24/00-B01D35/00; filtering material B01D39/00; their regeneration outside the filters B01D41/00) > Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence)
Of 8 combined children, 7 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 2022.
Child Classifications
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- B01D 46/68 by means acting on the cake side involving movement with regard to the filter elements since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/69 by means acting on the cake side without movement with respect to the filter elements, e.g. fixed nozzles since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/70 by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/74 by forces created by movement of the filter element since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/80 Chemical processes for the removal of the retained particles, e.g. by burning since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/86 Cleaning the filter surface by interrupting suction so that the filter cake falls by gravity since 2022 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