US3577389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Char resistant polyurethane
Assignee: Goodyear Tire and Rubber Co
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Filing: 1968-08-19
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Granted: 1971-05-04
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Expires: 1988-08-19
Abstract
Abstract A POLYURTHANE COMPOSITION PREPARED BY REACTING OTOLIDINE DIISOCYANATE, DICUMYL PROXIDE AND AN UNSATURATED POLYESTER DIOL OF THE STRUCTURE OBTAINED BY THE CONDENSATION OF ADIPIC ACID AND A MIXTURE OF ETHYLENE GLYCOL AND GLYCEROL A-ALLYL ETHER WHERE THE SAID COMPOSITION HAS A SHORE A HARDNESS OF FROM ABOUT 25 TO ABOUT 45 AND AN ARE IMAGE CHAR RATE OF FROM ABOUT 1.5 TO ABOUT 3 MILS/ SECOND.
Inventors
- 👤 George A Kuhar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7685; C08G18/28; C08G18/67; C08G18/68
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 |