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PCE
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DIFF Subgroup
C25D 5/12

at least one layer being of nickel or chromium

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Electroplating characterised by the process; Pretreatment or after-treatment of workpieces > Electroplating with more than one layer of the same or of different metals > at least one layer being of nickel or chromium

CPC:

Electroplating characterised by the process; Pretreatment or after-treatment of workpieces > Electroplating with more than one layer of the same or of different metals (for bearings C25D7/10) > at least one layer being of nickel or chromium

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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  • C25D 5/14 two or more layers being of nickel or chromium, e.g. duplex or triplex layers since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C25,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,797
  2. EBARA CORPORATION JP 729
  3. CENTRAL SOUTH UNIVERSITY 650
  4. INDUSTRIE DE NORA IT 641
  5. ROBERT BOSCH DE 600
  6. JFE STEEL JP 593
  7. KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 553
  8. SIEMENS DE 536
  9. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 525
  10. JX NIPPON MINING & METALS CORPORATION 499

Top Applicants (CPC)

Class C25,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,393
  2. JFE STEEL JP 914
  3. EBARA CORPORATION JP 738
  4. INDUSTRIE DE NORA IT 674
  5. JX NIPPON MINING & METALS CORPORATION JP 652
  6. NIPPON STEEL CORPORATION JP 633
  7. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 630
  8. ROBERT BOSCH DE 626
  9. SIEMENS DE 587
  10. ATOTECH DEUTSCHLAND DE 561