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PCE
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CPC Subgroup
B01J 47/022

characterised by the construction of the column or container

Full Title

Ion-exchange processes in general; Apparatus therefor (ion-exchange chromatography processes or apparatus B01D15/08) > Column or bed processes > characterised by the construction of the column or container

1 direct subcode

Child Classifications

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  • B01J 47/024 where the ion-exchangers are in a removable cartridge

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