US3699078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxamides and polyurethanes therefrom
Assignee: Akzona Inc
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Filing: 1970-05-18
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Granted: 1972-10-17
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Expires: 1990-05-18
Abstract
Abstract POLYALKANOL ARYALIPHATIC AMIDES AND POLYURETHANES OBTAINED BY REACTION OF SUCH AMIDES WITH POLYISOCYANATES. THE POLYURETHANES MAY BE FORMULATED FOR USE AS FOAMS, COATINGS, ELASTOMERS, AND ADHESIVES. THE POLYURETHANES PRODUCED ACCORDING TO THIS INVENTION HAVE EXCELLENT FIRE RETARDANT PROPERTIES AND DIMENSIONAL STABILITY.
Inventors
- 👤 Anthony J Castro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3825
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 |