the filtering material being held in a closed container

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof > with the filter bed stationary during the filtration > the filtering material being held in a closed container

CPC:

Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (B01D27/02 takes precedence) > with the filter bed stationary during the filtration > the filtering material being held in a closed container

Of 5 combined children, 4 exist in both systems.

1 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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B01D 24/105 CPC only CPC only
B01D 24/12 Downward filtration, the filtering material being supported by pervious surfaces (B01D24/18 takes precedence) since 1990 +1 CPC IPC+CPC Available in IPC and CPC
B01D 24/14 Downward filtration, the container having distribution or collection headers or pervious conduits (B01D24/18 takes precedence) since 1990 +1 CPC IPC+CPC Available in IPC and CPC
B01D 24/16 Upward filtration (B01D24/18 takes precedence) since 1990 +3 CPC IPC+CPC Available in IPC and CPC
B01D 24/18 Combined upward and downward filtration since 1990 +2 CPC 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