Glass-Ceramic Hob
Patent No. EP4448461 (titled "Glass-Ceramic Hob") was filed by Eurokera SNC on Dec 15, 2022. The application was issued on Sep 3, 2025.
Patent Summary
A lithium aluminosilicate-type glass-ceramic plate, used in cooking appliances or worktops, comprises a chemical composition (by weight percent) of 0.05 to <0.35% $\text{SnO}_2$, 0.05 to 0.40% $\text{V}_2\text{O}_5$, >0.32 to 0.40% $\text{Fe}_2\text{O}_3$, and 0.005 to 0.040% $\text{Cr}_2\text{O}_3$. These constituents must satisfy the relationship: $14 < 1000 \times (2\text{Fe}_2\text{O}_3 - \text{SnO}_2) \times \text{V}_2\text{O}_5 / 2 < 40$. The plate is produced by ceramizing a precursor lithium aluminosilicate mother glass to generate $\beta$-quartz or $\beta$-spodumene crystals. This composition enables modulated light transmission for aesthetic effects and LED visibility while maintaining low thermal expansion and high infrared transmission (approximately 950 nm and 2400 nm).
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Date
Description
EP4448461
- Application Number
- EP22840270A
- Filing Date
- Dec 15, 2022
- Status
- Granted And Under Opposition
- Aug 1, 2025
- Publication Date
- Sep 3, 2025
- External Links
- Slate, Register , Google Patents