Patent US3577385A successfully refreshed from Google Patents.
US3577385A
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Polyurethane elastomers prepared by reacting a mixture of a polyoxyalkylene ether diol of a dihydric phenol and a polyoxyalkylene ether of a polyol with an organic polyisocyanate
Assignee: Zeneca Inc
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Filing: 1967-05-15
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Granted: 1971-05-04
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Expires: 1987-05-15
Abstract
Abstract POLYURETHANES HAVING IMPROVED PROPERTIES ARE PREPARED BY REACTING POLYOXYALKYLENE ETHER DIOLS CONTAINING A CARBOXYCYCLIC OR OXACYCLIC RING AND FROM 2 TO 10 OXYALKYLENE GROUPS, POLYOXYALKYLENE ETHER POLYOLS CONTAINING FROM 5 TO 10 HYDROXYL GROUPS, AND FROM 15 TO 90 OXYALKYLENE GROUPS, AND ORGANIC POLYISOCYANATES.
Inventors
- 👤 Joseph Feltzin
- 👤 Nadji Y Tehrani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883; C08G18/08; C08G18/10; C08G18/4804; C08G18/4812; C08G18/4879
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |