US3663504A
Expired / Lapsed
US
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Radiation-resistant plastic insulators
Assignee: United States Atomic Energy Commission
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Filing: 1970-11-10
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Granted: 1972-05-16
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Expires: 1990-11-10
Abstract
Abstract A HIGH MOLECULAR WEIGHT ORGANIC COMPOSITION USEFUL AS AN ELECTRIC INSULATOR IN RADIATION FIELDS IN PROVIDED AND COMPRISES NORMALLY A SOLID POLYMER OF AN ORGANIC COMPOUND HAVING A SPECIFIC RESISTANCE GREATER THAN 10**19 OHMCM. AND CONTAINING PHENYL GROUPS AND 1 TO 7.5 WEIGHT PERCENT OF HIGH MOLECULAR WEIGHT ORGANIC PHOSPHITE, IN ONE EMBODIMENT THE COMPOSITION COMRPISES NORMALLY SOLID POLYSTYRENE HAVING 7.5 WEIGHT PERCENT TRIS B-CHLOROETHYL PHOSPHITE AS AN ADDITIVE; THE COMPOSITION EXHIBITED AN INCREASE IN THE POST-IRRADIATION RESISTIVITY OF OVER AN ORDER OF MAGNITUDE OVER THE POST-IRRAGIATION RESISTIVITY OF PURE POLYSTYRENE.
Inventors
- 👤 Bernard J Sturm
- 👤 William W Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:44
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/442; C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/06; H01B3/42; H01B3/427; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |