Patent US3801393A successfully refreshed from Google Patents.
US3801393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making an insulated cable with polyimide tape
Assignee: Raytheon Co
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Filing: 1972-10-20
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Granted: 1974-04-02
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Expires: 1992-10-20
Abstract
Abstract The invention concerns electrical wire which has been wrapped with insulating tape using as a sealant a compound of the following chemical formula: WHERE N IS GREATER THAN ONE. The polymer is the reaction product of 3,3'',4,4''-tetraaminobenzophenone and a 3,3'',4,4''-tetraester of benzophenone tetracarboxylic acid. Wire which has been wrapped according to this invention has improved electrical properties and high temperature stability.
Inventors
- 👤 N Bilow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:57
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B3/307; H01B3/308
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
The method of claim 1 wherein multiple layers of coated polyimide tape are wrapped around conductor wire, said layers being in reverse direction to each other and each layer having approximately a 50 percent overlap.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |