US2887394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a nonporous, semicrystalline ceramic body
Assignee: Corning Glass Works
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Filing: 1956-04-04
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Granted: 1959-05-19
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Fred A Bickford
- 👤 Smith Robert Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF MAKING A NON-POROUS, SEMI-CRSTALLINE, CERAMIC BODY WHICH COMPRISES INTIMATELY MIXING FINELY DIVIDED ALUMINA AND A PRE-MELTED AND FINELY DIVIDED GLASS, WHICH BY ANALYSIS IS FREE OF ALKALI METAL OXIDE, IN THE PROPORTIONS OF 60% TO 95% ALUMINA AND 40% TO 5% GLASS, MOLDING THE MIXTURE TO THE DESIRED SHAPE AND HEATING THE SHAPED BODY AT ABOUT 1400* -1625* C. TO FUSE THE GLASS AND BOND THE ALUMINA AS RAPIDLY AS POSSIBLE.
Claim 2
Independent Claim
74 words
THE METHOD OF MAKING A NON-POROUS, SEMI-CRSTALLINE, CERAMIC BODY WHICH COMPRISES INTIMATELY MIXING FINELY DIVIDED ALUMINA AND A PRE-MELTED AND FINELY DIVIDED GLASS, WHICH BY ANALYSIS IS FREE OF ALKALI METAL OXIDE, IN THE PROPORTIONS OF 60% TO 95% ALUMINA AND 40% TO 5% GLASS, MOLDING THE MIXTURE TO THE DESIRED SHAPE AND HEATING THE SHAPED BODY AT ABOUT 1400* -1625* C. TO FUSE THE GLASS AND BOND THE ALUMINA AS RAPIDLY AS POSSIBLE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |