Patent US3579552A successfully refreshed from Google Patents.
US3579552A
Expired / Lapsed
US
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Production of carboxylic acids
Assignee: BP Chemicals Ltd
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Filing: 1968-08-15
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Granted: 1971-05-18
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Expires: 1988-08-15
Abstract
Abstract THE PRESENT INVENTION RELATES TO A PROCESS FOR THE PREPARATION OF CARBOXYLIC ACIDS, SPECIFICALLY BY THE REACTION OF ETHYLENICALLY UNSATURATED COMPOUNDS WITH CARBON MONOXIDE AND WATER, IN THE PRESENCE OF CATALYST COMPOSITIONS ESSENTIALLY COMPRISING RHODIUM COMPOUNDS AND COMPLEXED, TOGETHER WITH AN IODIDE PROMOTER.
Inventors
- 👤 John H Craddock
- 👤 Arnold Hershman
- 👤 Frank E Paulik
- 👤 James F Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:22
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |