Patent US3585255A successfully refreshed from Google Patents.
US3585255A
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US
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Electrically superior polyester film containing polystyrene or polyionomer additive polymer
Assignee: 3M Co
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Filing: 1968-09-23
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Granted: 1971-06-15
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Expires: 1988-09-23
Abstract
Abstract PHYSICALLY BLENDING MINOR AMOUNTS OF POLYSTYRENE OR POLYIONOMERS INTO POLYESTER RESIN WHICH IS TO BE EXTRUDED INTO A FILM AND THEREAFTER ORIENTED, IMPARTS UNEXPECTEDLY SUPERIOR ELECTRICAL PROPERTIES TO THE ULTIMATE FILM. THE FILM ALSO DISPLAYS IMPROVED "SLIP" PROPERTIES.
Inventors
- 👤 Robert J Sevenich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; C; C08; C08L; C08L67/00; C08L67/02; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; Y; Y10; Y10S; Y10S525/00; Y10S525/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |