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PCE
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CPC Subgroup Additional Only
B01J 2540/32

Sulfonic acid groups or their salts

Full Title

Compositional aspects of coordination complexes or ligands in catalyst systems > Non-coordinating groups comprising sulfur > Sulfonic acid groups or their salts

1 direct subcode

Child Classifications

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  • B01J 2540/325 being perfluorinated, i.e. comprising at least one perfluorinated moiety as substructure in case of polyfunctional groups

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