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CPC Subgroup
C03B 37/10

Non-chemical treatment (surface treatment of fibres or filaments made from glass, minerals or slags C03C25/00)

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)

Filing statistics

CPC C03B 37/10 belongs to the parent subclass C03B, which recorded 57,876 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,190 in 2013 to 4,485 in 2023 (+7%), peaking at 6,433 applications in 2018. The most active applicants in class C03 are CORNING (9,559 applications), SAINT-GOBAIN GLASS (3,824 applications) and NIPPON ELECTRIC GLASS COMPANY (2,792 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • C03B 37/12 of fibres or filaments during winding up
  • C03B 37/16 Cutting or severing (light guides G02B6/25)

Top Applicants

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

  1. CORNING US 9,559
  2. SAINT-GOBAIN GLASS FR 3,824
  3. NIPPON ELECTRIC GLASS COMPANY JP 2,792
  4. SCHOTT DE 2,029
  5. AGC JP 1,938
  6. ASAHI GLASS COMPANY JP 1,679
  7. CORNING 1,650
  8. NIPPON ELECTRIC GLASS COMPANY 1,501
  9. A G C 1,049
  10. O-I (OWENS-ILLINOIS) US 1,027