US3106474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous ceramic compositions
Assignee: Vitramon Inc
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Filing: 1961-07-26
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Granted: 1963-10-08
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Expires: 1981-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Glabau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:34
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A VITREOUS CERAMIC COMPOSITION HAVING A DIELECTRIC CONSTANT WHICH IS STABLE OVER A TEMPERATURE RANGE OF -55*C. TO 125*C. AND HAVING A DISSIPATION FACTOR NO GREATER THAN 0.001 AFTER THE COMPOSTION IS TESTED AT 200* C. UNDER A VOLTAGE STRESS OF 50 VOLTS FOR 72 HOURS, SAID COMPOSITION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE FOLLOWING APPROXIMATE MOLE PERCENTAGES, 40 TO 55% SILICA, 20 TO 30% LEAD OXIDE, 5 TO 15% BIVALENT METAL OXIDE, 5 TO 15% ALKALI METAL FLUORIDE, 0 TO 5% TRIVALENT METAL OXIDE FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, BORIC OXIDE, LANTHAUM OXIDE AND CERIUM OXIDE, AND 5 TO 9% OF A MIXTURE OF ALKALI METAL OXIDES CONSISTING ESSENTIALLY OF AND CONTAINING AT LEAST ABOUT 3.3% OF POTASSIUM OXIDE, AT LEAST ABOUT 0.5% SODIUM OXIDE AND AT LEAST ABOUT 1.5% OF LITHIUM OXIDE, THE POTASSIUM OXIDE AND SODIUM OXIDE BEING PRESENT IN A MOLAR RATIO OF FROM ABOUT 4:1 TO ABOUT 7:1.
Claim 2
Dependent Claim
157 words
A VITREOUS CERAMIC COMPOSITION HAVING A DIELECTRIC CONSTANT WHICH IS STABLE OVER A TEMPERATURE RANGE OF -55*C. TO 125*C. AND HAVING A DISSIPATION FACTOR NO GREATER THAN 0.001 AFTER THE COMPOSTION IS TESTED AT 200* C. UNDER A VOLTAGE STRESS OF 50 VOLTS FOR 72 HOURS, SAID COMPOSITION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE FOLLOWING APPROXIMATE MOLE PERCENTAGES, 40 TO 55% SILICA, 20 TO 30% LEAD OXIDE, 5 TO 15% BIVALENT METAL OXIDE, 5 TO 15% ALKALI METAL FLUORIDE, 0 TO 5% TRIVALENT METAL OXIDE FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, BORIC OXIDE, LANTHAUM OXIDE AND CERIUM OXIDE, AND 5 TO 9% OF A MIXTURE OF ALKALI METAL OXIDES CONSISTING ESSENTIALLY OF AND CONTAINING AT LEAST ABOUT 3.3% OF POTASSIUM OXIDE, AT LEAST ABOUT 0.5% SODIUM OXIDE AND AT LEAST ABOUT 1.5% OF LITHIUM OXIDE, THE POTASSIUM OXIDE AND SODIUM OXIDE BEING PRESENT IN A MOLAR RATIO OF FROM ABOUT 4:1 TO ABOUT 7:1.
References Cited (Backward Citations)
US2413549A
Cited
US2469867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |