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CPC Subgroup Additional Only
C03B 2205/12

Drawing solid optical fibre directly from a hollow preform

Full Title

Fibre drawing or extruding details > Drawing solid optical fibre directly from a hollow preform

3 direct subcodes

Child Classifications

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  • C03B 2205/13 from a hollow glass tube containing glass-forming material in particulate form, e.g. to form the core by melting the powder during drawing
  • C03B 2205/14 comprising collapse of an outer tube onto an inner central solid preform rod
  • C03B 2205/16 the drawn fibre consisting of circularly symmetric core and clad

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