US3576903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-terminated adducts of carboxy terminated polyesters and polyepoxides
Assignee: 3M Co
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Filing: 1968-04-29
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Granted: 1971-04-27
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Expires: 1988-04-29
Abstract
Abstract EPOXY-TERMINATED POLYMERS COMPRISING AN ADDUCT AT AN EPOXY RESIN AND AN ACID-TERMINATED POLYMER HAVING ENTER AND AMIDE LINKAGES. THE ADDUCT INCLUDES AT LEAST TWO EPOXIDE EQUIVALENT WEIGHTS FOR EACH ACID EQUIVALENT WEIGHTS FOR EACH ACID EQUIVALENT WEIGHT OF ACID-TERMINATED POLYMER. THESE EPOXY-TERMINATED POLYMERS ARE RAPIDLY CURABLE WITH APPROPRIATE HARDENERS AND CATALYSTS AND YET FORM FLEXIBLE PRODUCTS.
Inventors
- 👤 Gaylord L Groff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:12
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/12; C08L; C08L63/00; C08L67/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 0
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |