US3013362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of semicrystalline ceramic bodies
Assignee: Corning Glass Works
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Filing: 1960-03-07
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Granted: 1961-12-19
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Faye A Calkins
- 👤 Joseph W Morrissey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0018; C03C10/0027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN THE METHOD OF CONVERTING A GLASS BODY TO A SEMICRYSTALLINE BODY BY HEAT TREATMENT, SAID SEMICRYSTALLINE BODY BEING SUBJECT TO ATTACK BY ALKALINE SOLUTIONS, THE METHOD OF INCREASING THE RESISTANCE TO SUCH ATTACK WHICH COMPRISES CARRYING OUT THE HEAT TREATMENT IN A REDUCING ATMOSPHERE, EQUIVALENT TO 1-10% OF EXCESS COMBUSTIBLES THEREIN, UNTIL THE TEMPERATURE HAS REACHED 900-1000*C., AND THEREAFTER SUBSTITUTING THEREFOR AN OXIDIZING ATMOSPHERE AND MAINTAINING IT DURING THE FINAL HEATING AND THE COOLING TO BELOW ABOUT 1000*C.
Claim 2
Dependent Claim
79 words
IN THE METHOD OF CONVERTING A GLASS BODY TO A SEMICRYSTALLINE BODY BY HEAT TREATMENT, SAID SEMICRYSTALLINE BODY BEING SUBJECT TO ATTACK BY ALKALINE SOLUTIONS, THE METHOD OF INCREASING THE RESISTANCE TO SUCH ATTACK WHICH COMPRISES CARRYING OUT THE HEAT TREATMENT IN A REDUCING ATMOSPHERE, EQUIVALENT TO 1-10% OF EXCESS COMBUSTIBLES THEREIN, UNTIL THE TEMPERATURE HAS REACHED 900-1000*C., AND THEREAFTER SUBSTITUTING THEREFOR AN OXIDIZING ATMOSPHERE AND MAINTAINING IT DURING THE FINAL HEATING AND THE COOLING TO BELOW ABOUT 1000*C.
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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |