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PCE
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DIFF Subgroup
C25D 5/14

two or more layers being of nickel or chromium, e.g. duplex or triplex layers

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 > two or more layers being of nickel or chromium, e.g. duplex or triplex layers

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 > two or more layers being of nickel or chromium, e.g. duplex or triplex layers

No child classifications to compare. This is a leaf node in both 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