CPC Main Group Additional Only
C03B 2211/00 Heating processes for glass melting in glass melting furnaces
4 direct subcodes
Child Classifications
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- C03B 2211/20 Submerged gas heating
- C03B 2211/30 introducing oxygen into the glass melting furnace separately from the fuel
- C03B 2211/40 using oxy-fuel burners
- C03B 2211/70 Skull melting, i.e. melting or refining in cooled wall crucibles or within solidified glass crust, e.g. in continuous walled vessels
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