CPC Subgroup Additional Only
C03C 2201/30 containing metals
Full Title
Glass compositions > Doped silica-based glasses > containing metals
Filing statistics
CPC C03C 2201/30 belongs to the parent subclass C03C, which recorded 95,236 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,471 in 2013 to 7,112 in 2023 (+10%), peaking at 10,632 applications in 2018. The most active applicants in class C03 are CORNING (9,559 applications), SAINT-GOBAIN GLASS (3,824 applications) and NIPPON ELECTRIC GLASS COMPANY (2,792 applications).
Source: EPO PATSTAT, worldwide filings
7 direct subcodes
Child Classifications
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- C03C 2201/31 containing germanium
- C03C 2201/32 containing aluminium (C03C2201/36 takes precedence)
- C03C 2201/34 containing rare earth metals (C03C2201/36 takes precedence)
- C03C 2201/40 containing transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn
- C03C 2201/50 containing alkali metals
- C03C 2201/54 containing beryllium, magnesium or alkaline earth metals
- C03C 2201/58 containing metals in non-oxide form, e.g. CdSe
Top Applicants
Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 9,559
- SAINT-GOBAIN GLASS FR 3,824
- NIPPON ELECTRIC GLASS COMPANY JP 2,792
- SCHOTT DE 2,029
- AGC JP 1,938
- ASAHI GLASS COMPANY JP 1,679
- CORNING 1,650
- NIPPON ELECTRIC GLASS COMPANY 1,501
- A G C 1,049
- O-I (OWENS-ILLINOIS) US 1,027