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DIFF Main Group
C03C 10/00

Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Introduced: January 1985

CPC subdivides this area 2x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions, 3 exist only in IPC.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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  • C03C 10/0009 CPC only CPC only
  • C03C 10/0054 CPC only CPC only
  • C03C 10/0063 CPC only CPC only
  • C03C 10/0072 CPC only CPC only
  • C03C 10/0081 CPC only CPC only
  • C03C 10/009 CPC only CPC only
  • C03C 10/02 Non-silica and non-silicate crystalline phase, e.g. spinel, barium titanate since 1985 IPC only IPC only
  • C03C 10/14 Silica crystalline phase, e.g. stuffed quartz, cristobalite since 1985 IPC only IPC only
  • C03C 10/16 Halogen containing crystalline phase since 1985 IPC+CPC Available in 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