US3813294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for insulating a preformed electrical coil
Assignee: Motors Liquidation Co
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Filing: 1972-03-06
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Granted: 1974-05-28
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Expires: 1992-03-06
Abstract
Abstract A PREFORMED ELECTRICAL COIL IS HEATED AND IMMERSED IN A BATH OF A STAGE EPOXY RESIN. THE COIL IS THEN IMMERSED IN A FLUID BED OFMICA POWDER UNTIL THE RESIN COAT ING BECOMES IMPREGNATED WITH MICA TO THE EXTRACT OF APPROXIMATELY 45% MICA. AFTER THE RESIN-MICA COATED COIL ISCURED AT A TEMPERATURE DETERMINED BY THE CURING TEMPERATURE OF THE EPOXY RESIN, IT IS IMMERSED IN A BATH OF A STAGE POLYESTER RESIN. THE POLYESTER COATED COIL IS AGAIN IMMERSED IN THE FLUID BED OFMICA POWDER TOPR PROVIDE A MICA COATING THEREON AND IS THEN DRIED AT ROOM TEMPERATURE.
Inventors
- 👤 E Jarvis
- 👤 C Dyer
- 👤 C Gaunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/546; B05D1/00; B05D1/18; B05D1/22; B05D1/24; H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H01F41/127; B05D2504/00; B05D2508/00; B05D2601/00; B05D2601/02; B05D2601/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49826; Y10T29/49885; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |