US2771487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary alkyl substituted cyclohexane carboxylic acids, derivatives thereof, and method for producing the same
Assignee: Shell Development Co
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Filing: 1950-12-26
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Granted: 1956-11-20
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Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Vernon W Buls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A PROCESS FOR PREPARING A TERITARY ALKYL-SUBSTITUTED CYCLOHEXANE CARBOXYLIC ACID WHEREIN THE RING CARBON ATOM BEARING THE TERTIARY ALKYL GROUP IS AT LEAST ONE CARBON ATOM REMOVED FROM THE RING CARBON ATOM BEARING THE CARBOXYL GROUP WHICH COMPRISES HYDROGENATING AN ALKALINE AQUEOUS SOLUTION OF A RELATIVELY WATER SOLUBLE SALT OF A CORRESPONDING AROMATIC ACID AT A TEMPERATURE ABOVE 150* C., AND CONVERTING THE RESULTING SALT OF THE CYCLOHEXANECARBOXYLIC ACID TO THE DESIRED CYCLOHEXANE CARBOXYLIC ACID.
References Cited (Backward Citations)
US2130989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |