IPC Subgroup
C03B 5/435 Heating arrangements for furnace walls
Introduced: January 1990
Last revised: January 2006
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 > Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls > Heating arrangements for furnace walls
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- GLASS; MINERAL OR SLAG WOOL
- Subclass:
- MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
Top Applicants
Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 8,800
- SAINT-GOBAIN GLASS FR 3,535
- NIPPON ELECTRIC GLASS COMPANY JP 2,675
- NIPPON ELECTRIC GLASS COMPANY 2,616
- AGC JP 1,911
- SCHOTT DE 1,846
- ASAHI GLASS COMPANY JP 1,632
- CORNING 1,556
- A G C 1,250
- SEKISUI CHEMICAL COMPANY JP 1,087