US3231399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semicrystalline ceramic bodies and method
Assignee: Corning Glass Works
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Filing: 1962-03-19
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Granted: 1966-01-25
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley D Stookey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0054
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A SEMICRYSTALLINE CERAMIC BODY CONSISTING ESSENTIALLY OF A MULTIPLICITY OF FINE-GRAINED, RANDOMLY-ORIENTED, INORGANIC CRYSTALS DISPERSED IN A GLASSY MATRIX, SAID CRYSTALS BEING FORMED BY CRYSTALLIZATION IN SITU FROM A GLASS BODY CONSISTING ESSENTIALLY, BY WEIGHT ON THE OXIDE BASIS, OF ABOUT 48-50% SIO2, ABOUT 16-18% AL2O3, ABOUT 23-25% MGO, AND ABOUT 10-11% SNO2 SAID GLASSY MATRIX CONSISTING ESSENTIALLY OF THE UNCRYSTALLIZED PORTION OF THE GLASS REMAINING AFTER THE CRYSTALLIZATION OF SAID CRYSTALS.
References Cited (Backward Citations)
US2876120A
Cited
US2920971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |