CPC Subgroup Additional Only
C03B 2203/222 Mismatching viscosities or softening points of glass layers
Full Title
Fibre product details, e.g. structure, shape > Internal structure or shape details > Radial profile of refractive index, composition or softening point > Mismatching viscosities or softening points of glass layers
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