CPC Subgroup
C03B 37/14 Re-forming fibres or filaments, (C03B37/025 takes precedence)
Full Title
Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags > Non-chemical treatment (surface treatment of fibres or filaments made from glass, minerals or slags C03C25/00) > Re-forming fibres or filaments, (C03B37/025 takes precedence)
1 direct subcode
Child Classifications
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- C03B 37/15 with heat application, e.g. for making optical fibres (fusion-splicing of light guides G02B6/255; treatment of light guides to shape optical elements )
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