US3582385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally crystallizable glass and glass-ceramic article
Assignee: Corning Glass Works
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Filing: 1968-10-07
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Granted: 1971-06-01
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Expires: 1988-10-07
Abstract
Abstract THIS INVENTION RELATES TO THE PRODUCTION OF GLASS-CERAMIC ARTICLES IN THE LI2O-BAO-AL2-O3-SIO2 COMPOSITION FIELD WHICH WHEN NUCLEATED WITH TIO2 AND OPTIONALLY, ZRO2 TO FORM BETA-SPODUMENE SOLID SOLUTION AND CELSIAN AS THE PRINCIPAL CRYSTAL PHASES, EXHIBITS AN AVERAGE COEFFICIENT OF THERMAL EXPANSION (25*-900*C.) OF LESS THAN 15X10**-7/8*C. AND DEMOSTRATE EXCELLENT DIMENSIONAL STABILITY WHEN SUBJECTED FOR LONG PERIODS OF TIME AT TEMPERATURES UP TO ABOUT 800*C. OR WHEN RAPIDLY THERMALLY CYCLED FROM ROOM TEMPERATURE TO TEMPERATURES ABOUT 800*C. SUCH GLASS-CERAMIC ARTICLES ARE ESPECIALLY SUITABLE FOR THE MANUFACTURE OF REGENERATIVE HEAT EXCHANGS FOR USE WITH TURBINE ENGINES.
Inventors
- 👤 David A Duke
- 👤 Max R Montierth
- 👤 Richard F Reade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0018; C03C10/0027; C03B; C03B17/00; C03B17/04
Claims Analysis
Total Claims: 0
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |