US3960920A
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Process for the preparation of a saturated polycyclic carboxylic acid
Assignee: NARD Institute
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Filing: 1975-02-13
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Granted: 1976-06-01
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Expires: 1995-02-13
Abstract
Abstract A saturated polycyclic carboxylic acid of the general formula:
Inventors
- 👤 Junichirow Ohotsubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:04
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A compound of the formula: ##SPC14## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are each hydrogen or methyl.
Claim 2
Dependent Claim
41 words
A compound of the formula: ##SPC14## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are each hydrogen or methyl.
Claim 3
Dependent Claim
123 words
A process for the preparation of a compound of the formula: ##SPC15## wherein R 1 , R 2 R 3 , R 4 , R 5 R 6 , R 7 , R 8 , R 9 and R 10 are each hydrogen or methyl, which comprises hydrogenating an unsaturated polycyclic nitrile compound of the general formula: ##SPC16## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are each as defined above, in the presence of a nobel metal catalyst in the absence of a solvent, at a temperature of from 100° to 180°C and at a pressure of about 1 atmosphere.
Claim 4
Dependent Claim
123 words
A process for the preparation of a compound of the formula: ##SPC15## wherein R 1 , R 2 R 3 , R 4 , R 5 R 6 , R 7 , R 8 , R 9 and R 10 are each hydrogen or methyl, which comprises hydrogenating an unsaturated polycyclic nitrile compound of the general formula: ##SPC16## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are each as defined above, in the presence of a nobel metal catalyst in the absence of a solvent, at a temperature of from 100° to 180°C and at a pressure of about 1 atmosphere.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |