US3720639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated polyols
Assignee: United States Department of the Navy
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Filing: 1971-06-24
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Granted: 1973-03-13
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Expires: 1991-06-24
Abstract
Abstract A FLUORINATED POLYOL IS FORMED FROM THE POLYMERIZATION REACTION OF A DIGLYCIDYL ETHER WITH A FLUORINATED DIHYDROXY HYDROCARBON. THE POLYMERIZATION MAY BE CARRIED OUT WITH A TERTIARY AMINE CATALYST AND WITH ARE WITHOUT A POLAR SOLVENT. THE REACTION MAY TAKE PLACE IN-SITU AS A COATING ON A SURFACE, OR AS AN ADHESIVE BETWEEN LAMINATES, OR AS A MOLDING MATERIAL WITHIN A MOLD. THE PRODUCT IS USEFUL IN APPLICATIONS REQUIRING THE HYPDROPHOBIC PROPERTIES OF FLUORINE IN COMBINATION WITH THE ADHESIVE AND MOLDING PROPERTIES OF EPOXY RESINS.
Inventors
- 👤 J Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |