US2836614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing unsaturated nitriles
Assignee: Distillers Co Yeast Ltd
•
Filing: 1953-08-13
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Granted: 1958-05-27
•
Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Bewley Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:21
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE UNSATURATED NITRILES FROM AN IMPURE MIXTURE CONTAINING THE DESIRED UNSATURATED NITRILE TOGETHER WITH THE CORRESPONDING UNSATURATED ALDEHYDE AND HYDROGEN CYANIDE AS IMPURITIES, WHICH COMPRISES REACTING THE UNSATURATED ALDEHYDE AND THE HYDROGEN CYANIDE TOGETHER TO FORM A CONDENSATION PRODUCT SO THAT SUBSTANTIALLY THE WHOLE OF ONE REACTANT IS CONVERTED, AND SEPARATING BY DISTILLATION THE RESULTING CONDENSATION PRODUCT FROM THE MIXTURE CONTAIN-ING THE UNSATURATED NITRILE AND ANY REMAINING UNCOVERTED REACTANT BEFORE FRACTIONATING THE MIXTURE TO RECOVER THE UNSATURATED NITRILE.
Claim 2
Dependent Claim
85 words
THE PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE UNSATURATED NITRILES FROM AN IMPURE MIXTURE CONTAINING THE DESIRED UNSATURATED NITRILE TOGETHER WITH THE CORRESPONDING UNSATURATED ALDEHYDE AND HYDROGEN CYANIDE AS IMPURITIES, WHICH COMPRISES REACTING THE UNSATURATED ALDEHYDE AND THE HYDROGEN CYANIDE TOGETHER TO FORM A CONDENSATION PRODUCT SO THAT SUBSTANTIALLY THE WHOLE OF ONE REACTANT IS CONVERTED, AND SEPARATING BY DISTILLATION THE RESULTING CONDENSATION PRODUCT FROM THE MIXTURE CONTAIN-ING THE UNSATURATED NITRILE AND ANY REMAINING UNCOVERTED REACTANT BEFORE FRACTIONATING THE MIXTURE TO RECOVER THE UNSATURATED NITRILE.
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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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |