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DIFF Subgroup
C03B 18/02

Forming sheets

Introduced: September 1968

Full Title

Shaping glass in contact with the surface of a liquid > Forming sheets

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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  • C03B 18/12 Making multilayer, coloured or armoured glass (chemical aspects C03C) since 1980 IPC+CPC Available in IPC and CPC
  • C03B 18/14 Changing the surface of the glass ribbon, e.g. roughening (by chemical methods C03C) since 1980 IPC+CPC Available in IPC and CPC
  • C03B 18/16 Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall since 1980 IPC+CPC Available in IPC and CPC
  • C03B 18/18 Controlling or regulating the temperature of the float bath; Composition or purification of the float bath since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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