Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
C02F 1/58

by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00)

Introduced: January 1980

Title

Titles differ between systems:

IPC: by removing specified dissolved compounds

CPC: by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00)

Full Title

Full titles differ between systems:

IPC:

Treatment of water, waste water, or sewage > by removing specified dissolved compounds

CPC:

Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

Navigate with arrow keys, Enter to open

  • C02F 1/583 CPC only CPC only
  • C02F 1/586 CPC only CPC only
  • C02F 1/60 Silicon compounds since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C02,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 3,734
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,761
  3. MIDEA 1,938
  4. TONGJI UNIVERSITY 1,433
  5. HARBIN INSTITUTE OF TECHNOLOGY 1,380
  6. HOHAI UNIVERSITY 1,367
  7. BEIJING UNIVERSITY OF TECHNOLOGY 1,317
  8. CHANGZHOU UNIVERSITY 1,248
  9. ZHEJIANG UNIVERSITY 1,229
  10. SOUTH CHINA UNIVERSITY OF TECHNOLOGY 1,203

Top Applicants (CPC)

Class C02,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 2,531
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 1,700
  3. KURITA WATER IND JP 1,287
  4. TONGJI UNIVERSITY 1,040
  5. CHANGZHOU UNIVERSITY 928
  6. ECOLAB US 904
  7. HARBIN INSTITUTE OF TECHNOLOGY 904
  8. BEIJING UNIVERSITY OF TECHNOLOGY 878
  9. HOHAI UNIVERSITY 862
  10. EVOQUA WATER TECHNOLOGIES US 842