Patent US3699063A successfully refreshed from Google Patents.
US3699063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane reaction mixture based on anhydrous diamine-ketone curative
Assignee: Goodyear Tire and Rubber Co
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Filing: 1971-01-14
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Granted: 1972-10-17
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Expires: 1991-01-14
Abstract
Abstract A POLYURETHANE REACTION MIXTURE COMPRISING AN ISOCYANATE TERMINATED POLYURETHANE AND A CURATIVE THEREFOR PREPARED BY TREATING A MIXTURE OF AT LEAST ONE DIAMINE HAVING AMINO GROUPS ATTACHED TO NON-BENZENOID CARBON ATOMS AND AT LEAST ONE LIQUID KETONE WITH A DRYING AGENT NON-REACTIVE TO DIAMINES AND KETONES. THE INVENTION HAS PARTICULAR UTILITY FOR INCREASING THE SET-UP TIME FOR SUCH A REACTION MIXTURE THROUGH THE SPECIAL TREATMENT OF THE CURATIVE, WHERE SUCH MIXTURES HAVE HERETOFORE HAD LIMITED COMMERCIAL POTENTIAL BECAUSE OF THEIR FAST SET-UP TIMES.
Inventors
- 👤 Anthony S Scheibelhoffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/088; C08G18/0885; C08G18/10
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |