US3674627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated electrical conductor
Assignee: EIDP Inc
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Filing: 1970-06-10
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Granted: 1972-07-04
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Expires: 1990-06-10
Abstract
Abstract AN INSULATED ELECTRICAL CONDUCTOR IS PROVIDED HAVING AN INSULATION WRAPPING OF A CRYSTALLINE COPOLYKETONE FILM STRUCTURE HAVING THE FOLLOWING REPEATING STRUCTURAL UNIT -(1,4-PHENYLENE)-O-(1,4-PHENYLENE)-CO-C6H4-CO- WHEREIN THE -C6H4- MOIETY IS EITHER -(1,4-PHENYLENE)-, OR -(1,3-PHENYLENE)- AND THE T:I RATIO VARIES FROM 90:10 TO 50:50. A PROCESS IS ALSO PROVIDED WHEREBY A COPOLKETONE FILM STRUCTURE HAVING THE ABOVE REPEATING STRUCTURAL UNIT IS WRAPPED AROUND AN ELECTRICAL CONDUCTOR AND THEREAFTER SUBJECTED TO TWO DISTINCT HEATING STEPS TO FIRST SEAL THE COPOLYKETONE WRAPPING COVERING AND THEN TO CRYSTALLIZE THE COPOLYKETONE WRAPPING COVERING.
Inventors
- 👤 Rudolph John Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:48
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/08; C08J2365/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/294; Y10T428/298
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |