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PCE
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DIFF Subgroup
C22B 19/34

Obtaining zinc oxide (purifying zinc oxide C01G9/02)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Obtaining zinc oxide

CPC: Obtaining zinc oxide (purifying zinc oxide C01G9/02)

Full Title

Full titles differ between systems:

IPC:

Obtaining zinc or zinc oxide > Obtaining zinc oxide

CPC:

Obtaining zinc or zinc oxide > Obtaining zinc oxide (purifying zinc oxide C01G9/02)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • C22B 19/36 in blast or reverberatory furnaces IPC+CPC Available in IPC and CPC
  • C22B 19/38 in rotary furnaces IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 7,152
  2. NIPPON STEEL CORPORATION JP 5,416
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,530
  4. JFE STEEL 3,986
  5. CENTRAL SOUTH UNIVERSITY 3,086
  6. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,843
  7. CHINESE ACADEMY OF SCIENCES 2,702
  8. ARCELORMITTAL LU 2,124
  9. NSSMC (NIPPON STEEL & SUMITOMO METAL) 2,075
  10. KOBE STEEL JP 1,891

Top Applicants (CPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 7,620
  2. NIPPON STEEL CORPORATION JP 5,769
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,523
  4. JFE STEEL 3,080
  5. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,999
  6. ARCELORMITTAL LU 2,962
  7. CENTRAL SOUTH UNIVERSITY 2,431
  8. KOBE STEEL JP 2,100
  9. CHINESE ACADEMY OF SCIENCES 2,052
  10. MITSUBISHI MATERIALS CORPORATION JP 1,405