Patent US3793254A successfully refreshed from Google Patents.
US3793254A
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US
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Catalysts for the reaction of nitrile carbonates-active hydrogen compounds
Assignee: Atlantic Richfield Co
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Filing: 1972-12-04
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Granted: 1974-02-19
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Expires: 1992-12-04
Abstract
Abstract A METHOD OF PREPARING ORGANIC COMPOUNDS HAVING ONE OR MORE UREA, UTETHANE 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, ADIPODI (NITRILE CARBONATE), WITH NUCLEOPHILIC COMPOUNDS CONTAINING A REACTIVE HYDROGEN ATOM, SUCH AS POLYESTER AND POLYETHER POLYOLS IN THE PRESENCE OF A CATALYTICALLY-EFFECTIVE AMOUNT OF AN N-OXIDE OF AN AMINE AT A TEMPERATURE OF ABOUT 50* TO 150*C.
Inventors
- 👤 L Wolgemuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/334; C08G65/3342; C08G71/00; C08G75/00; C08G75/02; C08G75/04; C08G75/045
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |