Patent US2831877A successfully refreshed from Google Patents.
US2831877A
Expired / Lapsed
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Production of carboxylic acids from olefins
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1953-03-17
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Granted: 1958-04-22
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Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Koch Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:38
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS FOR THE PRODUCTION OF CARBOXYLIC ACIDS, WHICH COMPROSE CONTACTING AN ALEFINIC COMPOUND AND CARBON MONOXIDE IN LIQUID PHASE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PROSENCE OF A SUBSTANTIALLY WATER-FREE ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID OF AT LEAST 90% STRENGTH, ANHYDROUS HYDROGEN FLUORIDE, ANHYDROUS CHLOROSULFONIC ACID AND ANHYDROUS HYDROGEN FLUORIDE WITH THE ADDITION OF BORON FLUORIDE, AND THEREAFTER ADDING WATER TO THE REACTION MIXTURE FORMED, AND RECOVERIGN THE CARBOXYLIC ACID.
Claim 2
Dependent Claim
75 words
PROCESS FOR THE PRODUCTION OF CARBOXYLIC ACIDS, WHICH COMPROSE CONTACTING AN ALEFINIC COMPOUND AND CARBON MONOXIDE IN LIQUID PHASE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PROSENCE OF A SUBSTANTIALLY WATER-FREE ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID OF AT LEAST 90% STRENGTH, ANHYDROUS HYDROGEN FLUORIDE, ANHYDROUS CHLOROSULFONIC ACID AND ANHYDROUS HYDROGEN FLUORIDE WITH THE ADDITION OF BORON FLUORIDE, AND THEREAFTER ADDING WATER TO THE REACTION MIXTURE FORMED, AND RECOVERIGN THE CARBOXYLIC ACID.
References Cited (Backward Citations)
US1973662A
Cited
US2759953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |