US2658075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing carboxylic acids and their anhydrides
Assignee: BASF SE
•
Filing: 1952-04-16
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Granted: 1953-11-03
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Expires: 1972-04-16
Abstract
No abstract record available.
Inventors
- 👤 Reppe Walter
- 👤 Schweckendiek Walter
- 👤 Kroeper Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:13
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/56; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF SATURATED ALIPHATIC CARBOXYLIC ACIDS AND THEIR ANHYDRIDES WHICH COMPRISES HEATING A MONOOLEFINIC ALIPHATIC HYDROCARBON TOGETHER WITH A SATURATED ALIPHATIC MONOCARBOXYLIC ACID TO TEMPERATURES BETWEEN ABOUT 180* AND 300* C. IN THE PRESENCE OF A NICKEL SALT OF SAID ACID WHICH CONTAINS IN COMPLEX COMBINATION OF A TERTIARY ORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND TRIPHENYL PHOSPHINE, WHILE MAINTAINING A CARBON MONOXIDE PRESSURE OF AT LEAST 100 ATMOSPHERES.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF SATURATED ALIPHATIC CARBOXYLIC ACIDS AND THEIR ANHYDRIDES WHICH COMPRISES HEATING A MONOOLEFINIC ALIPHATIC HYDROCARBON TOGETHER WITH A SATURATED ALIPHATIC MONOCARBOXYLIC ACID TO TEMPERATURES BETWEEN ABOUT 180* AND 300* C. IN THE PRESENCE OF A NICKEL SALT OF SAID ACID WHICH CONTAINS IN COMPLEX COMBINATION OF A TERTIARY ORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND TRIPHENYL PHOSPHINE, WHILE MAINTAINING A CARBON MONOXIDE PRESSURE OF AT LEAST 100 ATMOSPHERES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |