Patent US2693484A successfully refreshed from Google Patents.
US2693484A
Expired / Lapsed
US
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Noncatalytic ester exchange reaction of beta-keto carboxylic acid esters
Assignee: PPG Industries Inc
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Filing: 1951-04-07
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Granted: 1954-11-02
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Expires: 1971-04-07
Abstract
No abstract record available.
Inventors
- 👤 Lowell O Cummings
- 👤 Henry A Vogel
- 👤 Alfred R Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:45
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C07; C07C; C07C67/00; C07C67/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF FORMING AN ESTER OF A RELATIVELY HIGHER ALCOHOL AND A BETA-KETO ACID BY ESTER INTERCHANGE REACTION, WHICH COMPRISES HEATING A NON-CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF SAID ALCOHOL AND AN ESTER OF A LOWER ALIPHATIC MONOHYDRIC ALCOHOL AND SAID ACID, AT LEAST IN MOLECULAR EQUIVALENCY OF SAID HIGHER ALCOHOL AND SAID ESTER INTERCHANGE BETWEEN SAID HIGHER ALCOHOL AND SAID ESTER OF A LOWER ALCOHOL, REDUCING THE CONCENTRATION OF EVOLVED LOWER ALCOHOL SUFFICIENTLY LOW TO MAINTAIN THE DESIRED ESTER INTERCHANGE, MAINTAINING THE TEMPERATURES OF THE OF REACTION BELOW THE DECOMPOSITION TEMPERATURES OF THE ALCOHOLS AND THE BETA KETO ESTERS, UNTIL THE REACTION IS SUBSTANTIALLY COMPLECTED AND RECOVERING THE RESULTING ESTER OF THE HIGHER ALCOHOL.
Claim 2
Independent Claim
115 words
A METHOD OF FORMING AN ESTER OF A RELATIVELY HIGHER ALCOHOL AND A BETA-KETO ACID BY ESTER INTERCHANGE REACTION, WHICH COMPRISES HEATING A NON-CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF SAID ALCOHOL AND AN ESTER OF A LOWER ALIPHATIC MONOHYDRIC ALCOHOL AND SAID ACID, AT LEAST IN MOLECULAR EQUIVALENCY OF SAID HIGHER ALCOHOL AND SAID ESTER INTERCHANGE BETWEEN SAID HIGHER ALCOHOL AND SAID ESTER OF A LOWER ALCOHOL, REDUCING THE CONCENTRATION OF EVOLVED LOWER ALCOHOL SUFFICIENTLY LOW TO MAINTAIN THE DESIRED ESTER INTERCHANGE, MAINTAINING THE TEMPERATURES OF THE OF REACTION BELOW THE DECOMPOSITION TEMPERATURES OF THE ALCOHOLS AND THE BETA KETO ESTERS, UNTIL THE REACTION IS SUBSTANTIALLY COMPLECTED AND RECOVERING THE RESULTING ESTER OF THE HIGHER ALCOHOL.
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) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |