Patent US3632440A successfully refreshed from Google Patents.
US3632440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous composition for coating electric conductors
Assignee: Essex International Inc
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Filing: 1969-01-13
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Granted: 1972-01-04
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Expires: 1989-01-13
Abstract
Abstract A magnet wire characterized by an insulating resinous coating composition used as base coat and/or topcoat over a different base coating, said coatings having a low coefficient of friction. These coatings retain the ability to be overcoated with other coatings such as wire varnishes and enamel. The coatings, such as the reaction product of a polytrimellitamideimide film-forming resin and methyl tetradecyl polysiloxane, are applied in single or multiple coats from solutions over the wire or a base-coated wire, each coat being cured in an oven to cause the polymers to react or interact to produce smooth, hard, slippery surfaces.
Inventors
- 👤 Jerome A Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:57
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; H01B3/46; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
The conductor of claim 1 in which said polysiloxane is methyl tetRadecyl polysiloxane.
Claim 2
Dependent Claim
25 words
The insulated electrical conductor of claim 1 in which the conductor is copper having a base coat of polyester resin beneath said baked-on resinous coating.
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |