US3574711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl carbamates
Assignee: Proctor Chemical Co Inc
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Filing: 1968-05-14
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Granted: 1971-04-13
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Expires: 1988-05-14
Abstract
Abstract USE OF ZINC COMPOUNDS AS CATALYSTS GREATLY INCREASE PRODUCT YIELD, REDUCE REACTION TIME AND PROVIDE FURTHER IMPROVEMENTS OVER KNOWN METHODS OF PRODUCING ALKYL CARBAMATES BY REACTION OF AN ALKANOL WITH UREA. ZINC OXIDE IS MOST EFFECTIVE AS THE CATALYST AND PERMITS A PRODUCT YIELD OF ABOVE 90% IN PRODUCTION OF N-BUTYL CARBAMATE FROM BUTANOL AND UREA. THE PRODUCTS MAY BE REACTED WITH FORMALDEHYDE TO FORM METHYLOL DERIVATIVES THAT ARE EFFETIVE AS TEXTILE CREASE-PROOFING AGENTS.
Inventors
- 👤 Max O Robeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:11
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/28; B01J27/285
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |