US3661832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytrimellitamide-imides in phenolic solvents
Assignee: Standard Oil Co
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Filing: 1970-05-20
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Granted: 1972-05-09
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Expires: 1990-05-20
Abstract
Abstract AN AROMATIC POLYTRIMELLITAMIDE-IMIDE SOLUTION SUITABLE FOR PRODUCING SMOOTH CONTINUOUS COATINGS AND WIRE ENAMELS AT BAKING TEMPERATURES OF ABOUT 400*F. SAID SOLUTION COMPRISING SAID POLYTRIMELLITAMIDE-IMIDE AND PHENOLS OR SUBSTITUTED PHENOLS. A PROCESS FOR PRODUCING WIRE ENAMELS WHEREIN SAID AROMATIC POLYTRIMELLITAMIDES ARE DISSOLVED IN PHENOL OR ALKYL SUBSTITUTED PHENOLS AND A PROCESS FOR PREPARING POLYTRIMELLITAMIDE-IMIDE POLYMERS IN ALKYL SUBSTITUTED PHENOL SOLUTIONS.
Inventors
- 👤 James R Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |