Patent US2691684A successfully refreshed from Google Patents.
US2691684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetals and process for making
Assignee: —
•
Filing: —
•
Granted: 1954-10-12
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Expires: 1971-10-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/30; C07C41/00; C07C41/48; C07C41/50; C07C41/56; C07C43/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR MAKING AN ACETAL WHICH COMPRISES PASSING A VAPOR MIXTURE CONTAINING AS THE ESSENTIAL REACTANTS A SATURATED ALIPHATIC ALDEHYDE HAVING FROM 1 TO 7 CARBON ATOMS IN THE MOLECULAR AND A MONOHYDRIC ALKYL ALCOHOL HAVING FROM 1 TO 6 CARBON ATOMS IN THE MOLECULE, IN WHICH VAPOR MIXTURE AT LEAST ONE OF THE REACTANTS CONTAINS NOT MORE THAN ONE CARBON ATOMS IN THE MOLECULE, THROUGH A HEATED ZONE WHEREIN THE MIXTURE OF VAPORS IS HEATED TO A REACTION TEMPERATURE OF FROM 350* TO 600* C. IN THE ABSENCE OF A CATALYST FOR A CONTACT TIME OF FROM 0.1 TO 10 SECONDS, COOLING THE EFFLUENT VAPORS TO CONDENSE LIQUID PRODUCT AND SEPARATING THE ACETAL FROM THE CONDENSED LIQUID.
Claim 2
Dependent Claim
119 words
A PROCESS FOR MAKING AN ACETAL WHICH COMPRISES PASSING A VAPOR MIXTURE CONTAINING AS THE ESSENTIAL REACTANTS A SATURATED ALIPHATIC ALDEHYDE HAVING FROM 1 TO 7 CARBON ATOMS IN THE MOLECULAR AND A MONOHYDRIC ALKYL ALCOHOL HAVING FROM 1 TO 6 CARBON ATOMS IN THE MOLECULE, IN WHICH VAPOR MIXTURE AT LEAST ONE OF THE REACTANTS CONTAINS NOT MORE THAN ONE CARBON ATOMS IN THE MOLECULE, THROUGH A HEATED ZONE WHEREIN THE MIXTURE OF VAPORS IS HEATED TO A REACTION TEMPERATURE OF FROM 350* TO 600* C. IN THE ABSENCE OF A CATALYST FOR A CONTACT TIME OF FROM 0.1 TO 10 SECONDS, COOLING THE EFFLUENT VAPORS TO CONDENSE LIQUID PRODUCT AND SEPARATING THE ACETAL FROM THE CONDENSED LIQUID.
References Cited (Backward Citations)
US1312186A
Cited
US2451949A
Cited
US2508257A
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US2578724A
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US1850836A
Cited
US2350350A
Cited
US2337059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |