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DIFF Subgroup
B01D 24/04

the filtering material being clamped between pervious fixed walls (B01D24/10, B01D24/20 take precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: the filtering material being clamped between pervious fixed walls

CPC: the filtering material being clamped between pervious fixed walls (B01D24/10, B01D24/20 take precedence)

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 clamped between pervious fixed walls

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 clamped between pervious fixed walls (B01D24/10, B01D24/20 take precedence)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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  • B01D 24/042 CPC only CPC only
  • B01D 24/06 the pervious walls comprising a series of louvres or slots since 1990 IPC+CPC Available in IPC and CPC
  • B01D 24/08 the filtering material being supported by at least two pervious coaxial walls since 1990 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
  2. CHINESE ACADEMY OF SCIENCES 11,733
  3. BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
  4. LG CHEM KR 3,367
  5. PETROCHINA COMPANY 3,224
  6. IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
  7. ZHEJIANG UNIVERSITY 2,890
  8. MANN + HUMMEL DE 2,740
  9. JOHNSON MATTHEY GB 2,534
  10. SAUDI ARABIAN OIL COMPANY SA 2,527

Top Applicants (CPC)

Class B01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,345
  2. CHINESE ACADEMY OF SCIENCES 8,352
  3. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,134
  4. LG CHEM KR 4,290
  5. SAUDI ARABIAN OIL COMPANY SA 3,444
  6. IFPEN (IFP ENERGIES NOUVELLES) FR 3,417
  7. DOW GLOBAL TECHNOLOGIES US 3,195
  8. MANN + HUMMEL DE 2,822
  9. JOHNSON MATTHEY GB 2,802
  10. UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,737