Patent US3753968A successfully refreshed from Google Patents.
US3753968A
Expired / Lapsed
US
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Selective reaction of fatty acids and their separation
Assignee: Westvaco Corp
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Filing: 1971-07-01
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Granted: 1973-08-21
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Expires: 1991-07-01
Abstract
Abstract A PROCESS FOR MAKING A DICARBOXYLIC ACID HAVING 21 CARBON ATOMS FROM FATTY ACIDS IS ACCOMPLISHED BY REACTING THE LINOLEIC ACID PORTION IN A FATTY ACID MIXTURE WITH UP TO 26% BY WEIGHT OF FATTY ACIDS OF ACRYLIC ACID AND WITH FROM 0.01% TO 0.5% BY WEIGHT OF FATTY ACIDS OF IODINE CATALYST AT A TEMPERATURE BETWEEN 200*C. AND 270*C. THE FATTY ACID-DICAROXYLIC ACID MIXTURE IS THEN SEPARATED BY DISTILLING INTO AN OLEIC-TYPE FATTY ACID AND A G21 DICARBOXYLIC ACID. THIS PROCESS IS ESPECIALLY APPLICABLE TO SEPARATING TALL OIL FATTY ACIDS.
Inventors
- 👤 B Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:19
CPC Classifications
C; C11; C11C; C11C3/00; C07; C07C; C07C57/00; C07C57/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |