CPC Main Group
C03C 13/00 Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
7 direct subcodes
Child Classifications
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- C03C 13/04 Fibre optics, e.g. core and clad fibre compositions (light guides G02B6/00)
- C03C 13/06 Mineral fibres, e.g. slag wool, mineral wool, rock wool
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