CPC Subgroup Additional Only
C03B 2203/22 Radial profile of refractive index, composition or softening point
Full Title
Fibre product details, e.g. structure, shape > Internal structure or shape details > Radial profile of refractive index, composition or softening point
9 direct subcodes
Child Classifications
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- C03B 2203/222 Mismatching viscosities or softening points of glass layers
- C03B 2203/223 Matching viscosities or softening points of glass layers
- C03B 2203/224 Mismatching coefficients of thermal expansion [CTE] of glass layers
- C03B 2203/225 Matching coefficients of thermal expansion [CTE] of glass layers
- C03B 2203/23 Double or multiple optical cladding profiles
- C03B 2203/24 Single mode [SM or monomode]
- C03B 2203/26 Parabolic or graded index [GRIN] core profile
- C03B 2203/28 Large core fibres, e.g. with a core diameter greater than 60 micrometers
- C03B 2203/29 Segmented core fibres
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