C03 GLASS; MINERAL OR SLAG WOOL
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- GLASS; MINERAL OR SLAG WOOL
Description
Covers the manufacture, composition, and treatment of glass and inorganic fibrous materials produced from molten glass, minerals, or industrial slag. This class encompasses glassmaking processes (melting, refining, shaping), glass compositions and additives, surface treatment and working of glass products, and production of mineral or slag wool fibers for insulation and filtration applications. Excludes specialized glass products such as optical glass (G02B), glass-ceramic articles (C04B), and certain glass-to-metal seals where the sealing process is the primary focus.
Filing statistics
IPC C03 recorded 194,412 patent applications worldwide between 2013 and 2023, summed across its 2 subclasses. Annual filings grew from 14,360 in 2013 to 17,561 in 2023 (+22%), peaking at 20,307 applications in 2020. The most active applicants in class C03 are CORNING (8,800 applications), SAINT-GOBAIN GLASS (3,535 applications) and NIPPON ELECTRIC GLASS COMPANY (2,675 applications).
Source: EPO PATSTAT, worldwide filings
In class comparison
C03 comprises 2 subclasses with filings; the largest is C03C with 54.6% of the class's 194,412 applications between 2013 and 2023.
| Rank | Subclass | Title | Applications | Share |
|---|---|---|---|---|
| 1 | C03C, Chemical Composition of Glasses, Glazes or Vitreous Enamels; Surface Treatment of Glass; Surface Treatment of Fibres or Filaments Made From Glass, Minerals or Slags; Joining Glass to Glass or Other Materials | Chemical Composition of Glasses, Glazes or Vitreous Enamels; Surface Treatment of Glass; Surface Treatment of Fibres or Filaments Made From Glass, Minerals or Slags; Joining Glass to Glass or Other Materials | 106,119 | 54.6% |
| 2 | C03B, 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 | 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 | 88,293 | 45.4% |
Source: EPO PATSTAT, worldwide filings
Related Keywords
2 direct subcodes
Child Classifications
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- C03B 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
- C03C CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
Top Applicants
Top 10 applicants by patent filings, 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