CPC Subgroup Additional Only
C03C 2201/20 containing non-metals other than boron or halide
Full Title
Glass compositions > Doped silica-based glasses > containing non-metals other than boron or halide
6 direct subcodes
Child Classifications
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- C03C 2201/21 containing molecular hydrogen
- C03C 2201/22 containing deuterium
- C03C 2201/23 containing hydroxyl groups
- C03C 2201/24 containing nitrogen, e.g. silicon oxy-nitride glasses
- C03C 2201/26 containing carbon
- C03C 2201/28 containing phosphorus
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