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DIFF Main Group
C03B 21/00

Severing glass sheets, tubes or rods while still plastic

Introduced: September 1968

Title

Titles differ between systems:

IPC: Severing glass sheets, tubes, or rods while still plastic

CPC: Severing glass sheets, tubes or rods while still plastic

Full Title

Full titles differ between systems:

IPC:

Severing glass sheets, tubes, or rods while still plastic

CPC:

Severing glass sheets, tubes or rods while still plastic

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • C03B 21/02 by cutting (C03B9/46 takes precedence) IPC+CPC Available in IPC and CPC
  • C03B 21/04 by punching out IPC+CPC Available in IPC and CPC
  • C03B 21/06 by flashing-off, burning-off or fusing (C03B9/42 takes precedence) 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