Patent US2760875A successfully refreshed from Google Patents.
US2760875A
Expired / Lapsed
US
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Ceramic composition and process for making same
Assignee: Motors Liquidation Co
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Filing: 1951-10-31
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Granted: 1956-08-28
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Expires: 1971-10-31
Abstract
No abstract record available.
Inventors
- 👤 Schwartzwalder Karl
- 👤 Barlett Helen Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A CERAMIC BODY HAVING A DENSE NON-POROUS SINTERED STRUCTURE AND CONSISTING OF A MASS OF CORUNDUM CRYSTALS BONDED BY A MAGNESIUM AND STRONTIUM ALUMINUM SILICATE GLASS SAID BODY GIVING A FIRED ANALYSIS OF FROM ABOUT 85.5% TO 97% BY WEIGHTT ALUMINUM OXIDE, FROM ABOUT 1.9% TO 10.5% BY WEIGHT SILICON, DIOXIDE, FROM ABOUT .15 TO 2.2% BY WEIGHT STRONTIUM OXIDE, AND FROM ABOUT .4% TO 3.3% BY WEIGHT MAGNESIUM OXIDE.
Claim 2
Dependent Claim
70 words
A CERAMIC BODY HAVING A DENSE NON-POROUS SINTERED STRUCTURE AND CONSISTING OF A MASS OF CORUNDUM CRYSTALS BONDED BY A MAGNESIUM AND STRONTIUM ALUMINUM SILICATE GLASS SAID BODY GIVING A FIRED ANALYSIS OF FROM ABOUT 85.5% TO 97% BY WEIGHTT ALUMINUM OXIDE, FROM ABOUT 1.9% TO 10.5% BY WEIGHT SILICON, DIOXIDE, FROM ABOUT .15 TO 2.2% BY WEIGHT STRONTIUM OXIDE, AND FROM ABOUT .4% TO 3.3% BY WEIGHT MAGNESIUM OXIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |