IPC Subgroup
C03C 25/104 to obtain optical fibres
Introduced: January 2018
Full Title
Surface treatment of fibres or filaments made from glass, minerals or slags > Coating > to obtain optical fibres
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- GLASS; MINERAL OR SLAG WOOL
- Subclass:
- CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
Additional Content
cladding layer arranged around a core, in which optical properties of the cladding and the core, e.g. refractive index, are different coating layer of plastics or other materials to give non-optical properties, e.g. mechanical properties, to a finished optical fibre
3 direct subcodes
Child Classifications
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- C03C 25/105 Organic claddings
- C03C 25/106 Single coatings
- C03C 25/1065 Multiple coatings
Top Applicants
Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 8,800
- SAINT-GOBAIN GLASS FR 3,535
- NIPPON ELECTRIC GLASS COMPANY JP 2,675
- NIPPON ELECTRIC GLASS COMPANY 2,616
- AGC JP 1,911
- SCHOTT DE 1,846
- ASAHI GLASS COMPANY JP 1,632
- CORNING 1,556
- A G C 1,250
- SEKISUI CHEMICAL COMPANY JP 1,087