Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
B01D 71/74

Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Natural macromolecular material or derivatives thereof

CPC: Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence)

Full Title

Full titles differ between systems:

IPC:

Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor > Organic material > Natural macromolecular material or derivatives thereof

CPC:

Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor > Organic material > Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence)

No child classifications to compare. This is a leaf node in both 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