CPC Subgroup
C03C 25/60 by diffusing ions or metals into the surface
Full Title
Surface treatment of fibres or filaments made from glass, minerals or slags > by diffusing ions or metals into the surface
3 direct subcodes
Child Classifications
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- C03C 25/601 in the liquid phase, e.g. using solutions or molten salts
- C03C 25/607 in the gaseous phase
- C03C 25/608 in the solid phase, e.g. using pastes or powders
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