CPC Main Group
C03C 4/00 Compositions for glass with special properties
Filing statistics
CPC C03C 4/00 belongs to the parent subclass C03C, which recorded 95,236 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,471 in 2013 to 7,112 in 2023 (+10%), peaking at 10,632 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
20 direct subcodes
Child Classifications
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- C03C 4/02 for coloured glass
- C03C 4/04 for photosensitive glass
- C03C 4/08 for glass selectively absorbing radiation of specified wave lengths
- C03C 4/10 for infrared transmitting glass
- C03C 4/12 for luminescent glass; for fluorescent glass
- C03C 4/14 for electro-conductive glass
- C03C 4/16 for dielectric glass
- C03C 4/18 for ion-sensitive glass
- C03C 4/20 for chemical resistant glass
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