B01D 39/20 of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material ; sintering metals C22C1/04; )
Introduced: September 1968
Title
Titles differ between systems:
IPC: of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
CPC: of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material ; sintering metals C22C1/04; )
Full Title
Full titles differ between systems:
Filtering material for liquid or gaseous fluids > Other self-supporting filtering material > of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
Filtering material for liquid or gaseous fluids > Other self-supporting filtering material > of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material ; sintering metals C22C1/04; )
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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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