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IPC Subgroup
C03C 3/085

containing an oxide of a divalent metal

Introduced: January 1985

Last revised: January 2006

Full Title

Glass compositions > containing silica > with 40% to 90% silica by weight > containing aluminium oxide or an iron compound > containing an oxide of a divalent metal

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

1 direct subcode

Child Classifications

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  • C03C 3/087 containing calcium oxide, e.g. common sheet or container glass

Top Applicants

Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CORNING US 8,800
  2. SAINT-GOBAIN GLASS FR 3,535
  3. NIPPON ELECTRIC GLASS COMPANY JP 2,675
  4. NIPPON ELECTRIC GLASS COMPANY 2,616
  5. AGC JP 1,911
  6. SCHOTT DE 1,846
  7. ASAHI GLASS COMPANY JP 1,632
  8. CORNING 1,556
  9. A G C 1,250
  10. SEKISUI CHEMICAL COMPANY JP 1,087