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Patent US3645969A successfully refreshed from Google Patents.
US3645969A
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Curable polyepoxide compositions containing as a curing agent a mixture of a polyglycol polyamine and an alkylene polyamine
Assignee: Union Carbide Corp
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Filing: 1970-06-22
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Granted: 1972-02-29
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Expires: 1990-06-22
Abstract
Abstract THIS INVENTION RELATES TO CURABLE POLYEPOXIDE COMPOSITIONS, CONTAINING AS THE CURING AGENT A MIXTURE OF A POLYGLYCOL POLYAMINE AND AN ALKYLENE POLYAMINE, WHICH WHEN USED IN THE DESIRED MANNER, AS FOR EXAMPLE IN COATING, CASTING OF FILAMENT WINDING APPLICATIONS TO FORM ARTICLES OF DESIRED SHAPE, AND CURED TO INFUSIBLE PRODUCTS, ARE CHARACTERIZED BY EXCELLENT FLEXIBILITY AND TOUGHNESS AND BY EXCELLENT SURFACE CHARACTERISTICS.
Inventors
- 👤 James R Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:32
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08L; C08L63/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |