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CPC Subgroup Additional Only
C03B 2201/30

doped with metals, e.g. Ga, Sn, Sb, Pb or Bi

Full Title

Type of glass produced > Doped silica-based glasses > doped with metals, e.g. Ga, Sn, Sb, Pb or Bi

7 direct subcodes

Child Classifications

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  • C03B 2201/31 doped with germanium
  • C03B 2201/32 doped with aluminium (C03B2201/36 takes precedence)
  • C03B 2201/50 doped with alkali metals
  • C03B 2201/54 doped with beryllium, magnesium or alkaline earth metals
  • C03B 2201/58 doped with metals in non-oxide form, e.g. CdSe

Top Applicants

Top 10 applicants by patent filingsfor 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