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IPC Subgroup
C03B 18/18

Controlling or regulating the temperature of the float bath; Composition or purification of the float bath

Introduced: January 1980

Last revised: January 2006

Full Title

Shaping glass in contact with the surface of a liquid > Forming sheets > Controlling or regulating the temperature of the float bath; Composition or purification of the float bath

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

Filing statistics

IPC C03B 18/18 belongs to the parent subclass C03B, which recorded 88,293 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,347 in 2013 to 8,869 in 2023 (+40%), peaking at 9,707 applications in 2020. The most active applicants in class C03 are CORNING (8,800 applications), SAINT-GOBAIN GLASS (3,535 applications) and NIPPON ELECTRIC GLASS COMPANY (2,675 applications).

Source: EPO PATSTAT, worldwide filings

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