B01D 46/00 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)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
CPC: 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)
Full Title
Full titles differ between systems:
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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)
Of 20 combined children, 14 exist in both systems.
6 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B01D 46/02 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material +2 CPC IPC+CPC Available in IPC and CPC
- B01D 46/10 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces +2 CPC IPC+CPC Available in IPC and CPC
- B01D 46/18 Particle separators, e.g. dust precipitators, using filtering belts +1 CPC IPC+CPC Available in IPC and CPC
- B01D 46/24 Particle separators, e.g. dust precipitators, using rigid hollow filter bodies +1 CPC IPC+CPC Available in IPC and CPC
- B01D 46/28 Particle separators, e.g. dust precipitators, using filter brushes IPC+CPC Available in IPC and CPC
- B01D 46/30 Particle separators, e.g. dust precipitators, using loose filtering material IPC+CPC Available in IPC and CPC
- B01D 46/40 Particle separators, e.g. dust precipitators, using edge filters, i.e. using contiguous impervious surfaces +2 CPC IPC+CPC Available in IPC and CPC
- B01D 46/52 Particle separators, e.g. dust precipitators, using filters embodying folded material +2 CPC IPC+CPC Available in IPC and CPC
- B01D 46/54 Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms +2 CPC IPC+CPC Available in IPC and CPC
- B01D 46/56 with multiple filtering elements, characterised by their mutual disposition (B01D46/12 takes precedence) since 2022 IPC+CPC Available in IPC and CPC
- B01D 46/66 Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence) since 2022 +1 CPC IPC+CPC Available in IPC and CPC
- B01D 46/90 Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance 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