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CPC Subgroup Additional Only
C03B 2205/62

Heating means for drawing

Full Title

Fibre drawing or extruding details > Optical fibre draw furnaces > Heating means for drawing

Filing statistics

CPC C03B 2205/62 belongs to the parent subclass C03B, which recorded 57,876 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,190 in 2013 to 4,485 in 2023 (+7%), peaking at 6,433 applications in 2018. The most active applicants in class C03 are CORNING (9,559 applications), SAINT-GOBAIN GLASS (3,824 applications) and NIPPON ELECTRIC GLASS COMPANY (2,792 applications).

Source: EPO PATSTAT, worldwide filings

6 direct subcodes

Child Classifications

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  • C03B 2205/63 Ohmic resistance heaters, e.g. carbon or graphite resistance heaters
  • C03B 2205/64 Induction furnaces, i.e. HF/RF coil, e.g. of the graphite or zirconia susceptor type
  • C03B 2205/66 Microwave or similar electromagnetic wave heating, e.g. resonant cavity type
  • C03B 2205/67 Laser heating
  • C03B 2205/68 Hot gas, e.g. plasma, flame, burner
  • C03B 2205/69 Auxiliary thermal treatment immediately prior to drawing, e.g. pre-heaters, laser-assisted resistance heaters

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