CPC Subgroup Additional Only
C03C 2201/34 containing rare earth metals (C03C2201/36 takes precedence)
Full Title
Glass compositions > Doped silica-based glasses > containing metals > containing rare earth metals (C03C2201/36 takes precedence)
17 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C03C 2201/3405 Scandium
- C03C 2201/3411 Yttrium
- C03C 2201/3417 Lanthanum
- C03C 2201/3423 Cerium
- C03C 2201/3429 Praseodymium
- C03C 2201/3435 Neodymium
- C03C 2201/3441 Samarium
- C03C 2201/3447 Europium
- C03C 2201/3452 Gadolinium
- C03C 2201/3458 Terbium
- C03C 2201/3464 Dysprosium
- C03C 2201/347 Holmium
- C03C 2201/3476 Erbium
- C03C 2201/3482 Thulium
- C03C 2201/3488 Ytterbium
- C03C 2201/3494 Lutetium
- C03C 2201/36 containing rare earth metals and aluminium, e.g. Er-Al co-doped
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