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CPC Subgroup
C03B 5/18

Stirring devices; Homogenisation

Full Title

Melting in furnaces; Furnaces so far as specially adapted for glass manufacture > Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces > Stirring devices; Homogenisation

4 direct subcodes

Child Classifications

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  • C03B 5/182 by moving the molten glass along fixed elements, e.g. deflectors, weirs, baffle plates
  • C03B 5/193 using gas, e.g. bubblers

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