US3583919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulating refractory composition of fused magnesium oxide and silica or alkali metal silicates
Assignee: General Electric Co
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Filing: 1968-02-01
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Granted: 1971-06-08
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Expires: 1988-02-01
Abstract
Abstract A GRANULAR REFRCTORY HEAT CONDUCTIVE ELECTRICAL INSULATING COMPOSITION, WHICH COMPOSITION MAY BE USED FOR SHEATHING ELECTRICAL ELEMENTS. THE COMPOSITION CONSISTS OF IN ADMIXTURE 99.9-80.0 WEIGHT PERCENT OF FUSED MAGNESIUM OXIDE AND CORRESPONDINGLY 0.1-20.0 WEIGHT PERCENT OF AN ADDITIVE WHICH MAY BE EITHER SILICA, EARTH-ALKALI SILICATES, EARTH METAL SILICATES, CARBON SILICATES, CLAY OR MIXTURES OF THE ABOVE AND WHEREIN THE COMPOSITION MUST CONTAIN LESS THAN 5 WEIGHT PERCENT OF WITHE AN ALKALI METAL SALT OR AN ALKALI METAL OXIDE. THE PREFERRED ADDITIVE IS QUARTZ.
Inventors
- 👤 Louis J Balint
- 👤 Everett F Bodendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; H01; H01B; H01B3/00; H01B3/002; H01B3/006
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |