Patent US3574703A successfully refreshed from Google Patents.
US3574703A
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US
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Synthesis of alpha,beta-unsaturated nitriles
Assignee: Eastman Kodak Co
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Filing: 1967-10-23
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Granted: 1971-04-13
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Expires: 1987-10-23
Abstract
Abstract ALPHA, BETA-UNSATURATED ALDEHYDES, KETONES, NITRILES AND ESTERS ARE FORMED BY THE VAPOR PHASE CONDENSATION OF SATURATED ALDEHYDES, KETONES, NITRILES AND ALKYL ESTERS OF ALIPHATIC MONOCARBOXYLIC ACIDS WITH FORMALDEHYDE IN THE PRESENCE OF AN UNMODIFIED SILICA GEL CATALYST. THE ACTIVITY AND EFFECTIVENESS OF THE CATALYST IS A FUNCTION OF THEIR PORE VOLUME AND SURFACE AREA. THE USE OF THE SILICA GEL CATALYST SYSTEMS GIVE IMPROVED CONVERSIONS AND YIELDS OF UNSATURATED PRODUCT AND IS ACCOMPANIED BY RETENTION OF CATALYST ACTIVITY AT A HIGH LEVEL.
Inventors
- 👤 Hugh J Hagemeyer Jr
- 👤 Alden E Blood
- 👤 Thomas C Snapp Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:17
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/30; C07C67/333; C07C67/343; C07C253/00; C07C253/30; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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 |