IPC Subgroup
C03B 37/025 from reheated softened tubes, rods, fibres or filaments
Introduced: January 1980
Last revised: January 2006
Full Title
Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags > Manufacture of glass fibres or filaments > by drawing or extruding > from reheated softened tubes, rods, fibres or filaments
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- GLASS; MINERAL OR SLAG WOOL
- Subclass:
- MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
4 direct subcodes
Child Classifications
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- C03B 37/026 Drawing fibres reinforced with a metal wire
- C03B 37/027 Fibres composed of different sorts of glass, e.g. fibre optics
- C03B 37/028 Drawing fibre bundles, e.g. for making fibre bundles of multifibres
- C03B 37/029 Furnaces therefor
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