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Patent US3242257A successfully refreshed from Google Patents.
US3242257A
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Arc interrupting molding composition and electrical apparatus made therefrom
Assignee: Rostone Corp
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Filing: 1963-09-17
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Granted: 1966-03-22
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Expires: 1983-09-17
Abstract
No abstract record available.
Inventors
- 👤 Paul W Jones
- 👤 Robert E Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:14
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/002; H01B3/006; H01B3/008; H01B3/18; H01B3/30; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/06; Y; Y10; Y10S; Y10S174/00; Y10S174/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN A MOLDED ELECTRICAL INSULATING ELEMENT COMPRISING A MOLDED COMPOSITION CONSISTING ESSENTIALLY OF A BINDER AND A SUBSTANTIAL PROPORTION OF HYDRATED ALUMINA, THE IMPROVEMENT WHICH CONSISTS OF AN ARC-INTERRUPTING ADDITION COMPOUND INTERSPERSED THROUGH THE COMPOSITION WITH THE HYDRATED ALUMINA AND COMPRISING A STRONGLY ELECTRONEGATIVE ELEMENT OF THE CLASS CONSISTING OF FLUORINE, CHLORINE, BROMINE, IODINE, SULFUR, PHOSPHOROUS AND BORON, BOUND IN THE COMPOUNDS BY PREDOMINANTLY COVALENT BONDS, THE COMPOUND BEING SUBSTANTIALLY STABLE AT NORMAL TEMPERATURE, SUBSTANTIALLY NON-REACTIVE WITH OTHER COMPONENTS OF THE COMPOSITION, AND NON-CONDUCTIVE IN THE PROPORTIONS PRESENT.
References Cited (Backward Citations)
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US2768264A
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US2830919A
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |