US3704268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable,solid polymers based on cycloaliphatic polyepoxides and a method for the preparation thereof
Assignee: Union Carbide Corp
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Filing: 1970-04-13
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Granted: 1972-11-28
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Expires: 1990-04-13
Abstract
Abstract THIS INVENTION RELATES TO CURABLE, SOLID POLYMERS, BASED ON CYCLOALIPHATIC POLYPEROXIDES, AND TO A METHOD FOR THE PREPARATION THEREOF BY REACTING A LIQUID CYCLOALIPHATIC POLYEPOXIDE WITH A POLYFUNCTIONAL, ACIDIC CO-REACTANT HAVING A PKA VALUE OF LESS THAN ABOUT 8, SUCH AS POLYCARBOXYLIC ACID OR A POLYHYDRIC PHENOL, IN A REACTION MEDIUM CONTAINING A TERTIARY AMINE. THE CURABLE, SOLID POLYMERS OF THIS INVENTION CAN BE USED IN MOLDING, COATING AND LAMINATING APPLICATIONS AND CURED TO INFUSIBLE PRODUCTS CHARACTERIZED BY EXCELLENT PROPERTIES SUCH AS ELECTRICAL PROPERTIES.
Inventors
- 👤 John Wynstra
- 👤 Thomas B Gibb Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:19
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/40; C08G59/50; C08G59/56; C08G59/58
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |