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PCE
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DIFF Subgroup
B01D 25/21

Plate and frame presses (B01D25/172, B01D25/176, B01D25/19 take precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Plate and frame presses

CPC: Plate and frame presses (B01D25/172, B01D25/176, B01D25/19 take precedence)

Full Title

Full titles differ between systems:

IPC:

Filters formed by clamping together several filtering elements or parts of such elements > Filter presses, i.e. of the plate or plate and frame type > Plate and frame presses

CPC:

Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D29/39) > Filter presses, i.e. of the plate or plate and frame type > Plate and frame presses (B01D25/172, B01D25/176, B01D25/19 take precedence)

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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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