CPC Main Group
C03B 32/00 Thermal after-treatment of glass products not provided for in groups , C03B25/00 - C03B31/00 , e.g. crystallisation, eliminating gas inclusions or other impurities;
2 direct subcodes
Child Classifications
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- C03B 32/02 Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
Top Applicants
Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 9,559
- SAINT-GOBAIN GLASS FR 3,824
- NIPPON ELECTRIC GLASS COMPANY JP 2,792
- SCHOTT DE 2,029
- AGC JP 1,938
- ASAHI GLASS COMPANY JP 1,679
- CORNING 1,650
- NIPPON ELECTRIC GLASS COMPANY 1,501
- A G C 1,049
- O-I (OWENS-ILLINOIS) US 1,027