Patent US2626283A successfully refreshed from Google Patents.
US2626283A
Expired / Lapsed
US
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Preparation of acrolein acetal
Assignee: —
•
Filing: —
•
Granted: 1953-01-20
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Expires: 1970-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:36
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/21; C07C47/22; C07C43/00; C07C43/30; C07C43/303; C07C45/00; C07C45/51; C07C45/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN THE PRODUCTION OF AN ACETAL OF ACROLEIN, CONTACTING A LIQUID MIXTURE OF ACROLEIN AND AN ALCOHOL AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 50* C. WITH POROUS SOLID CALCINED SILICAALUMINA HYDROGEL, HAVING A SURFACE AREA NOT LESS THAN ABOUT 100 SQUARE METERS PER GRAM, UNTIL THE ACETAL OF ACROLEIN AND THE ALCOHOL IS FORMED, AND RECOVERING SAID ACETAL FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
65 words
IN THE PRODUCTION OF AN ACETAL OF ACROLEIN, CONTACTING A LIQUID MIXTURE OF ACROLEIN AND AN ALCOHOL AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 50* C. WITH POROUS SOLID CALCINED SILICAALUMINA HYDROGEL, HAVING A SURFACE AREA NOT LESS THAN ABOUT 100 SQUARE METERS PER GRAM, UNTIL THE ACETAL OF ACROLEIN AND THE ALCOHOL IS FORMED, AND RECOVERING SAID ACETAL FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |