US3573074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halide nucleated glass-ceramic articles giving mie light scattering
Assignee: Corning Glass Works
•
Filing: 1968-03-08
•
Granted: 1971-03-30
•
Expires: 1988-03-08
Abstract
Abstract THIS INVENTION RELATES TO THE PRODUCTION OF GLASS-CERAMIC ARTICLES IN THE LI2O-NA2O- AL2O3-SIO2 COMPOSITION FIELD WHICH ARE NUCLEATED WITH NAF TO FORM BETA-QUARTZ SOLID SOLUTION AND/OR BETA-SPODUMENE SOLID SOLUTION AS THE PRINCIPAL CRYSTAL PHASE THEREIN. THESE GLASS-CERAMIC ARTICLES MAY BE TRANSLUCENT AND, HAVING CRYSTALS OF A PROPER SIZE AND WITH AN INDEX OF REFRACTION MUCH DIFFERENT FROM THAT OF THE RESIDUAL GLASS, EXHIBIT GOOD VOLUME SCATTERING CHARACTERISTICS FOR VISIBLE LIGHT, THEREBY MAKING THEM ESPECIALLY SUITABLE FOR SUCH APPLICATIONS AS REAR VIEW PROJECTION SCREENS.
Inventors
- 👤 David A Duke
- 👤 Thomas R Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0018; C03C10/0027
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References 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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |