US3303033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory products
Assignee: General Dynamics Corp
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Filing: 1962-07-16
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Granted: 1967-02-07
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Grange Lee D La
- 👤 William A Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:22
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/124; H01M8/1246; H01M8/1253; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A HOT PRESSED, LOW PERMEABILITY, HIGH DENSITY, ZIRCONIA BASE REFRACTORY PRODUCT CONSISTING ESSENTIALLY OF A ZIRCONIA BASE SELECTED FROM THE GROUP CONSISTING OF A SOLID SOLUTION OF ZIRCONIA AND BETWEEN ABOUT 15 AND ABOUT 25 MOLE PERCENT CALCIA, AND A SOLID SOLUTION OF ZIRCONIA AND BETWEEN ABOUT 7 AND ABOUT 45 MOLE PERCENT YTTRIA, BETWEEN ABOUT 0.5 AND ABOUT ONE PERCENT BY WEIGHT OF THE REFRACTORY PRODUCT OF AN ALKALI METAL OXIDE, AND BETWEEN ABOUT 0.2 AND ABOUT ONE PERCENT BY WEIGHT OF THE REFRACTORY PRODUCT OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF SILICON, TITANIUM, BORON AND GERMANIUM, SAID REFRACTORY PRODUCT HAVING A POROSITY LESS THAN ABOUT ONE PERCENT MEASURED BY A METHOD SIMILAR TO ASTM PROCEDURE C20-46.
References Cited (Backward Citations)
US2567592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |