Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
B01J 4/00

Feed devices; Feed or outlet control devices (feed or outlet devices for pressure vessels B01J3/02 )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Feed devices; Feed or outlet control devices

CPC: Feed devices; Feed or outlet control devices (feed or outlet devices for pressure vessels B01J3/02 )

Full Title

Full titles differ between systems:

IPC:

Feed devices; Feed or outlet control devices

CPC:

Feed devices; Feed or outlet control devices (feed or outlet devices for pressure vessels B01J3/02 )

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

Navigate with arrow keys, Enter to open

  • B01J 4/008 CPC only CPC only
  • B01J 4/02 for feeding measured quantities of reagents IPC+CPC Available in IPC and CPC
  • B01J 4/04 using osmotic pressure since 1985 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