US3766147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of cyclic nitrile carbonates with fluoride compounds
Assignee: Atlantic Richfield Co
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Filing: 1972-07-31
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Granted: 1973-10-16
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Expires: 1992-07-31
Abstract
Abstract A METHOD OF PREPARING ORGANIC COMPOUNDS HAVING ONE OR MORE UREA, URETHANE OR THIOURETHANE GROUPS BY REACTING CYCLIC NITRILE CARBONATES OF THE FORMULA: (2-(O=)-1,3,4-DIOXAZOL-5-YL)N-R WHEREIN, R IS AN ORGANIC RADICAL WHICH IS FREE OF REACTIVE HYDROGEN ATOMS AND N IS 1 OR MORE, SUCH AS, ADIPONITRILE CARBONATE, WITH NUCLEOPHILIC COMPOUNDS CONTAINING A REACTIVE HYDROGEN ATOM, SUCH AS, POLYESTER AND POLYETHER TRIOLS, IN THE PRESENCE OF A CATALYTICALLY-EFFECTIVE AMOUNT FO AN INORGANIC OR AN ORGANIC FLUORIDE, SUCH AS, KF, CSF, RBF, TETRAALKYLAMMONIUM FLUORIDE, ETC. AT A TEMPERATURE OF ABOUT-10 TO 150*C.
Inventors
- 👤 L Wolgemuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
C; C07; C07D; C07D273/00; C08; C08G; C08G71/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |