Glass-ceramic having a reflective surface and process for making same
Abstract
Abstract A GLASS COMPOSITION APABLE OF BEING THERMALLY IN SITU CRYSTALLIZED TO A GLASS-CERAMIC HAVING A HIGHLY REFLECTIVE INTEGRAL SURFACE FILM, WHICH SURFACE FILM IS RESISTANT TO HIGH TEMPERATURES, TO CHEMICAL CORROSION AND TO ABRASION, SAID COMPOSITION CONSISTING ESSENTIALLY OF SIO2-AL2O3LI2O-FE2O3 BASE GLASS CONTAINING A NUCLEATING ZGENT. THE BASE GLASS CONTAINS A SUFFICIENT AMOUNT OF FE2O3 TO PRODUCE A HIGHLY REFLECTIVE SURFACE FILM ON THE GLASS-CERAMIC FORMED THEREFROM. THERE IS ALSO PROVIDED A PROCESS FOR PREPARING A GLASS-CERAMIC HAVING SUCH A HIGHLY REFLECTIVE SURFACE FILM. THE GLASS-CERAMIC OF THE INVENTION IS PARTICULARLY USEFUL FOR LINING THE INTERIOR OF COOKING AND BAKING OVENS AND, WHEN THE GLASS-CERAMIC IS A FLAT PLATE OF A FEW MICRONS THICKNESS WITH OPPOSITE REFLECTIVE SURFACES, IT CAN BE USED TO SPLIT LIGHT BEAMS BY SELECTIVE TRANSMITTANCE AND REFLECTION.
Inventors
- 👤 P Pirooz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |