US3652471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester amide-imide wire enamels
Assignee: Westinghouse Electric Corp
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Filing: 1969-07-28
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Granted: 1972-03-28
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Expires: 1989-07-28
Abstract
Abstract ECONOMICAL WIRE ENAMELS ARE MADE BY COLD BLENDING A POLYESTER-AMIDE-IMIDE OF HIGH AMIDE-IMIDE CONTENT WITH POLYESTER OF MODEST COST. PREFERABLY, THE COMPOSITION ALSO COMPRISES AN ESTER-URETHANE ISOCYANATE AS COMPATIBILIZING AGENT. THERE ARE THUS OBTAINED WIRE-ENAMEL FORMULATIONS OF LOW OR MODEST COST THAT OUTPERFORM THE OIL-MODIFIED ACRYLICS IN THERMAL LIFE AND THE PLAIN ENAMELS (OLEORESINOUS OR SYNTHETIC OIL-MODIFIED POLYESTER) IN SEVERAL OTHER PROPERTIES.
Inventors
- 👤 Frank A Sattler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4081; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G18/8067; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C09; C09D; C09D167/00
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |