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DIFF Subgroup
C03C 25/603

under application of an electrical potential difference

Introduced: January 2018

Full Title

Full titles differ between systems:

IPC:

Surface treatment of fibres or filaments made from glass, minerals or slags > by diffusing ions or metals into the surface > in the liquid phase, e.g. using solutions or molten salts > to perform ion-exchange between alkali ions > under application of an electrical potential difference

CPC:

Surface treatment of fibres or filaments made from glass, minerals or slags > by diffusing ions or metals into the surface > in the liquid phase, e.g. using solutions or molten salts > to perform ion-exchange between alkali ions (C03C25/605 takes precedence) > under application of an electrical potential difference

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

Top Applicants

Top Applicants (IPC)

Class C03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CORNING US 8,800
  2. SAINT-GOBAIN GLASS FR 3,535
  3. NIPPON ELECTRIC GLASS COMPANY JP 2,675
  4. NIPPON ELECTRIC GLASS COMPANY 2,616
  5. AGC JP 1,911
  6. SCHOTT DE 1,846
  7. ASAHI GLASS COMPANY JP 1,632
  8. CORNING 1,556
  9. A G C 1,250
  10. SEKISUI CHEMICAL COMPANY JP 1,087

Top Applicants (CPC)

Class C03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CORNING US 9,559
  2. SAINT-GOBAIN GLASS FR 3,824
  3. NIPPON ELECTRIC GLASS COMPANY JP 2,792
  4. SCHOTT DE 2,029
  5. AGC JP 1,938
  6. ASAHI GLASS COMPANY JP 1,679
  7. CORNING 1,650
  8. NIPPON ELECTRIC GLASS COMPANY 1,501
  9. A G C 1,049
  10. O-I (OWENS-ILLINOIS) US 1,027