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CPC Subgroup
B01D 71/06

Organic material

Full Title

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

20 direct subcodes

Child Classifications

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  • B01D 71/24 Rubbers
  • B01D 71/46 Epoxy resins
  • B01D 71/50 Polycarbonates
  • B01D 71/54 Polyureas; Polyurethanes
  • B01D 71/56 Polyamides, e.g. polyester-amides
  • B01D 71/72 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of the groups B01D71/46 - B01D71/70
  • B01D 71/74 Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence)

Top Applicants

Top 10 applicants by patent filingsfor 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