Patent US3758426A successfully refreshed from Google Patents.
US3758426A
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US
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Hydroxy terminated polybutadienes
Assignee: Department of National Defence
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Filing: 1971-09-29
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Granted: 1973-09-11
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Expires: 1991-09-29
Abstract
Abstract A HYDROXY-TERMINATED POLYBUTADIENE IS FORMED BY REACTION WITH A CARBOXY-TERMINATED POLYBUTADIENE AND AN ALKYLENE OXIDE. THE HYDROXY POLYMER HAS APPLICATION FOR USE AS A BINDER FOR SOLID PROPELLANTS WHEN CURED WITH A TRIISOCYANATE OR A DIISOCYANATE AND A TRIS ( HYDROXY-TERMINATED) POLYHYDROCARBON.
Inventors
- 👤 J Boivin
- 👤 M Tremblay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:40
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36; C08C19/38; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/694
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |