Patent US2987524A successfully refreshed from Google Patents.
US2987524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cyclic
Assignee: —
•
Filing: —
•
Granted: 1961-06-06
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Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:00
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/12; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A PROCESS FOR PREPARING A CYCLIC UNSATURATED ACETAL COMPRISING REACTING AN ALPHA,BETA-ETHYLENIC MONOALDEHYDE SELECTED FROM THE GROUP OF HYDROCARBON AND CHLORINATED HYDROCARBON MONOALDEHYDES HAVING FROM 3 TO 12 CARBON ATOMS AND WHICH ARE FREE FROM REACTIVE CONSTITUENTS OTHER THAN THE ETHYLENIC DOUBLE BOND, THE CARBONYL GROUP, AND THE CHLORINE ATOM, WITH A POLYOL HAVING TWO CARBINOL GROUPS SEPARATED BY NOT MORE THAN ONE CARBON ATOM, SELECTED FROM THE GROUP CONSISTING OF SATURATED HYDROCARBON AND CHLORINATED HYDROCARBON POLYOLS, IN THE PRESENCE OF 0.02 TO 0.06 MOLE OF A SULFO ACID PER MOLE OF THE MONOALDEHYDE AT A TEMPERATURE OF 60* TO 100*C. FOR NOT MORE THAN THREE HOURS WHILE REMOVING THE WATER FORMED IN THE REACTION, WHEREBY THE CYCLIC ACETAL OF SAID ETHYLENIC ALDEHYDE IS PRODUCED.
Claim 2
Dependent Claim
125 words
A PROCESS FOR PREPARING A CYCLIC UNSATURATED ACETAL COMPRISING REACTING AN ALPHA,BETA-ETHYLENIC MONOALDEHYDE SELECTED FROM THE GROUP OF HYDROCARBON AND CHLORINATED HYDROCARBON MONOALDEHYDES HAVING FROM 3 TO 12 CARBON ATOMS AND WHICH ARE FREE FROM REACTIVE CONSTITUENTS OTHER THAN THE ETHYLENIC DOUBLE BOND, THE CARBONYL GROUP, AND THE CHLORINE ATOM, WITH A POLYOL HAVING TWO CARBINOL GROUPS SEPARATED BY NOT MORE THAN ONE CARBON ATOM, SELECTED FROM THE GROUP CONSISTING OF SATURATED HYDROCARBON AND CHLORINATED HYDROCARBON POLYOLS, IN THE PRESENCE OF 0.02 TO 0.06 MOLE OF A SULFO ACID PER MOLE OF THE MONOALDEHYDE AT A TEMPERATURE OF 60* TO 100*C. FOR NOT MORE THAN THREE HOURS WHILE REMOVING THE WATER FORMED IN THE REACTION, WHEREBY THE CYCLIC ACETAL OF SAID ETHYLENIC ALDEHYDE IS PRODUCED.
Claim 3
Independent Claim
47 words
A METHOD OF PRODUCING 2-VINYL-1,3-DIOXANE WHICH COMPRISES REACTING ACROLEIN WITH 2-METHYL-2,4-PENTANEDIOL AT A TEMPERATURE OF ABOUT 60*-100*C. FOR NOT MORE THAN THREE HOURS IN THE PRESENCE OF 0.02 TO 0.06 MOLE OF A SULFO ACID PER MOLE OF ACROLEIN WHILE REMOVING THE WATER FORMED IN THE REACTION.
Claim 4
Independent Claim
47 words
A METHOD OF PRODUCING 2-VINYL-1,3-DIOXANE WHICH COMPRISES REACTING ACROLEIN WITH 2-METHYL-2,4-PENTANEDIOL AT A TEMPERATURE OF ABOUT 60*-100*C. FOR NOT MORE THAN THREE HOURS IN THE PRESENCE OF 0.02 TO 0.06 MOLE OF A SULFO ACID PER MOLE OF ACROLEIN WHILE REMOVING THE WATER FORMED IN THE REACTION.
References Cited (Backward Citations)
US1934309A
Cited
US2131998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |