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US3352698A
Expired / Lapsed
US
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Method of making glass ceramic and product
Assignee: English Electric Co Ltd
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Filing: 1967-01-09
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Granted: 1967-11-14
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Expires: 1987-01-09
Abstract
No abstract record available.
Inventors
- 👤 Mcmillan Peter William
- 👤 Lawton Donald Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:49
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0018; C03C10/0027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A METHOD OF MAKING A GLASS-CERAMIC PRODUCT INCLUDING THE STEPS OF MELTING GLASS BATCH MATERIALS TO FORM A GLASS, SAID MATERIALS INCLUDING ZRO2 AS A NUCLEATING AGENT, AND HEAT-TREATING THE RESULTING GLASS BY HEATING IT TO A CRYSTALLIZATION TEMPERATURE IN THE RANGE 900-1,100*C. UNTIL A PRODUCT WHICH IS AT LEAST PARTIALLY MICROCRYSTALLINE IS OBTAINED, THE IMPROVEMENT WHICH COMPRISES SELECTING BATCH MATERIALS TO FORM A GLASS CONSISTING ESSENTIALLY OF, IN PERCENTAGES BY WEIGHT:
Claim 2
Dependent Claim
73 words
IN A METHOD OF MAKING A GLASS-CERAMIC PRODUCT INCLUDING THE STEPS OF MELTING GLASS BATCH MATERIALS TO FORM A GLASS, SAID MATERIALS INCLUDING ZRO2 AS A NUCLEATING AGENT, AND HEAT-TREATING THE RESULTING GLASS BY HEATING IT TO A CRYSTALLIZATION TEMPERATURE IN THE RANGE 900-1,100*C. UNTIL A PRODUCT WHICH IS AT LEAST PARTIALLY MICROCRYSTALLINE IS OBTAINED, THE IMPROVEMENT WHICH COMPRISES SELECTING BATCH MATERIALS TO FORM A GLASS CONSISTING ESSENTIALLY OF, IN PERCENTAGES BY WEIGHT:
References Cited (Backward Citations)
DE1099135B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |