US3822147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated electrical conductor and coils formed thereof
Assignee: Phelps Dodge Magnet Wire Corp
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Filing: 1972-05-05
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Granted: 1974-07-02
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Expires: 1992-05-05
Abstract
Abstract A METAL CONDUCTOR COATED WITH MULTIPLE LAYERS OF A CURED POLYAROMATIC POLYCARBOXYLIC AROMATIC IMIDE RESIN AND A CURED PHENOXY RESIN. THE LAYERS ARE SUPERPOSED AND MAY BE ARRANGED SO AS TO PROVIDE AN INNER LAYER OF IMIDE RESIN AND AN OUTER LAYER OF PHENOXY RESIN, AN INNER LAYER OF PHENOXY RESIN AND AN OUTER LAYER OF IMIDE RESIN, OR BOTH INNER AND OUTER LAYERS OF IMIDE RESIN WITH A MEDIATE LAYER OF PHENOXY RESIN SANDWICH THEREBETWEEN. MAGNET. WRITE MADE IN ACCORDANCE WITH THE INVENTION HAS SPECIAL UTILITY IN OIL-FILLED TRANSFORMERS.
Inventors
- 👤 E Koerner
- 👤 W Wareham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B3/42; H01B3/427; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |