US2801263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of alpha, omega-dicarboxylic acids and esters
Assignee: Eastman Kodak Co
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Filing: 1953-06-18
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Granted: 1957-07-30
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Expires: 1973-06-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hasek
- 👤 Edward U Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:20
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14; C07C67/00; C07C67/36; C07C67/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR PREPARING PREDOMINANT YIELDS OF AN A,W-DIBASIC ACID LOWER ALKYL ESTER, COMPRISING REACTING AN UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER OF THE FORMULA CH3(CH2)MCH=(CH2)NCO2R, WHERE M AND N ARE SELECTED FROM 0-4 SUCH THAT M+N IS 0-4 AND R IS LOWER ALKYL, WITH CARBON MONOXIDE AND R''OH, WHERE R'' IS SELECTED FROM HYDROGEN AND LOWER ALKYL, IN THE PRESENCE OF A SUBSTANTIAL AMOUNT OF SAID A,W-DIBASIC ACID LOWER ALKYL ESTER AT ABOUT 100-350*C. AND ABOUT 500-12,400 P.S.I. AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT METAL, COBALT SALT OF ORGANIC CARBOXYLIC ACIDS, COBALT CARBONYLS, AND COBALT CARBONYL DERIVATIVES TO OBTAIN MIGRATION OF THE DOUBLE BOND IN SAID UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER AND TO PRODUCE A SUBSTANTIAL YIELD OF SAID A,W-DIBASIC ACID LOWER ALKYL ESTER FROM SAID UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER.
Claim 2
Dependent Claim
139 words
A PROCESS FOR PREPARING PREDOMINANT YIELDS OF AN A,W-DIBASIC ACID LOWER ALKYL ESTER, COMPRISING REACTING AN UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER OF THE FORMULA CH3(CH2)MCH=(CH2)NCO2R, WHERE M AND N ARE SELECTED FROM 0-4 SUCH THAT M+N IS 0-4 AND R IS LOWER ALKYL, WITH CARBON MONOXIDE AND R''OH, WHERE R'' IS SELECTED FROM HYDROGEN AND LOWER ALKYL, IN THE PRESENCE OF A SUBSTANTIAL AMOUNT OF SAID A,W-DIBASIC ACID LOWER ALKYL ESTER AT ABOUT 100-350*C. AND ABOUT 500-12,400 P.S.I. AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT METAL, COBALT SALT OF ORGANIC CARBOXYLIC ACIDS, COBALT CARBONYLS, AND COBALT CARBONYL DERIVATIVES TO OBTAIN MIGRATION OF THE DOUBLE BOND IN SAID UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER AND TO PRODUCE A SUBSTANTIAL YIELD OF SAID A,W-DIBASIC ACID LOWER ALKYL ESTER FROM SAID UNSATURATED ACYCLIC CARBOXYLIC ACID ESTER.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |