US3170805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramics and their production
Assignee: English Electric Co Ltd
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Filing: 1961-02-20
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Granted: 1965-02-23
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Expires: 1981-02-20
Abstract
No abstract record available.
Inventors
- 👤 Mcmillan Peter William
- 👤 Partridge Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A CERAMIC MATERIAL FORMED BY CONTROLLED DEVITRIFICATION OF A HEAT-SENSITIVE GLASS CONSISTING OF MAJOR CONSTITUENTS WHICH MAKE UP AT LEAST 90 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION AND LIE IN THE SYSTEM DEFINED BY LI2O-2.0 TO 27.0 PERCENT, ZNO-10.0 TO 59/9 PERCENT, AND SIO2-34.0 TO 81.0 PERCENT; MINOR CONSTITUENTS WHICH CONSIST OF AN OXIDE OF AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ALUMINIUM, MAGNESIUM, CALCIUM, BARIUM, LEAD AND BORON; AND A NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF GOLD, SILVER, COPPER AND PHOSPHATE ION.
Claim 2
Dependent Claim
93 words
A CERAMIC MATERIAL FORMED BY CONTROLLED DEVITRIFICATION OF A HEAT-SENSITIVE GLASS CONSISTING OF MAJOR CONSTITUENTS WHICH MAKE UP AT LEAST 90 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION AND LIE IN THE SYSTEM DEFINED BY LI2O-2.0 TO 27.0 PERCENT, ZNO-10.0 TO 59/9 PERCENT, AND SIO2-34.0 TO 81.0 PERCENT; MINOR CONSTITUENTS WHICH CONSIST OF AN OXIDE OF AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ALUMINIUM, MAGNESIUM, CALCIUM, BARIUM, LEAD AND BORON; AND A NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF GOLD, SILVER, COPPER AND PHOSPHATE ION.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |