Patent US2769718A successfully refreshed from Google Patents.
US2769718A
Expired / Lapsed
US
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Zirconia cement
Assignee: Saint Gobain Abrasives Inc
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Filing: 1954-10-12
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Granted: 1956-11-06
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Expires: 1974-10-12
Abstract
No abstract record available.
Inventors
- 👤 Nell N Ault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/46; C04B35/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A CHEMICAL SETTING CEMENT MIXTURE AS YET UNSET ESSENTIALLY CONSISTING OF FROM 90% TO 99% OF ZIRCONIA OF WHICH AT LEAST 80% IS STABILIZED ZIRCONIA CONTAINING FROM 3% TO 6% BY WEIGHT OF LIME, CAO, ON THE AMOUNT OF ZRO2 THEREOF, THE REMAINDER ALUMINUM PHOSPHATE HAVING A PH AT LEAST AS HIGH AS 3 NUMERICALLY.
Claim 2
Dependent Claim
55 words
A CHEMICAL SETTING CEMENT MIXTURE AS YET UNSET ESSENTIALLY CONSISTING OF FROM 90% TO 99% OF ZIRCONIA OF WHICH AT LEAST 80% IS STABILIZED ZIRCONIA CONTAINING FROM 3% TO 6% BY WEIGHT OF LIME, CAO, ON THE AMOUNT OF ZRO2 THEREOF, THE REMAINDER ALUMINUM PHOSPHATE HAVING A PH AT LEAST AS HIGH AS 3 NUMERICALLY.
References Cited (Backward Citations)
AU207531A
Cited
US2535526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |