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DIFF Subgroup
C03B 15/16

Drawing tubes, cylinders or rods, coated with coloured layers

Introduced: September 1968

Title

Titles differ between systems:

IPC: Drawing tubes, cylinders, or rods, coated with coloured layers

CPC: Drawing tubes, cylinders or rods, coated with coloured layers

Full Title

Full titles differ between systems:

IPC:

Drawing glass upwardly from the melt > Drawing tubes, cylinders, or rods from the melt > Drawing tubes, cylinders, or rods, coated with coloured layers

CPC:

Drawing glass upwardly from the melt > Drawing tubes, cylinders, or rods from the melt > Drawing tubes, cylinders or rods, coated with coloured layers

No child classifications to compare. This is a leaf node in both 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