US3631079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of carboxylic acids and unsaturated esters of carboxylic acids
Assignee: Knapsack AG
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Filing: 1968-03-22
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Granted: 1971-12-28
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Expires: 1988-03-22
Abstract
Abstract PRODUCTION OF CARBOXYLIC ACIDS (DEFINED AS CARBOXYLIC ACIDS I) AND OF UNSATURATED ESTERS OF CARBOXYLIC ACIDS (DEFINED AS CARBOXYLIC ACIDS II), WHEREBY THE CARBOXYLIC ACID II MAY BE IDENTICAL WITH THE CARBOXYLIC ACID I, BY REACTING AN OLEFINIC COMPOUND IN THE PRESENCE OF AN ALDEHYDE, WHICH IN STRUCTURE AND NUMBER OF CARBON ATOMS CORRESPONDS TO THE CARBOXYLIC ACID I, AND IN THE PRESENCE OF THE CARBOXYLIC ACID II, EACH OF THE SAID OLEFINIC COMPOUND, THE SAID ALDEHYDE AND THE SAID CARBOXYLIC ACIDS CONTAINING 2 TO 20 CARBON ATOMS, WITH MOLECULAR OXYGEN OR AIR IN THE GAS PHASE, AT ELEVATED TEMPERATURE AND IN CONTACT WITH A PALLADIUM-CONTAINING CARRIER CATALYST.
Inventors
- 👤 Kurt Sennewald
- 👤 Wilhelm Vogt
- 👤 Heinz Erpenbach
- 👤 Hermann Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:57
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |