US2945059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mevalonic acid
Assignee: Merck and Co Inc
•
Filing: 1958-03-31
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Granted: 1960-07-12
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Shunk
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:06
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF RECOVERING A-MEVALONIC ACID FROM AB-MEVALONIC ACID WHICH INCLUDES THE STEPS OF MIXING IN THE PRESENCE OF A SOLVENT (+)-A-PHENYL-1-NAPHTHALENEMETHYLAMINE WITH THE AB-MEVALONIC ACID LACTONE AT ELEVATED TEMPERATURES, REMOVING SAID SOLVENT AND RECOVERING THE RESULTING MIXTURE OF THE (+)-A-PHENYL-1-NAPHTHALENEMETHYLAMIDES OF THE A-AND THE B-MEVALONIC ACIDS, ADDING SAID MIXTURE OF AMIDES TO BENZENE TO THEREBY OBTAIN A SELECTIVE PRECIPITATION OF THE AMIDE OF A-MEVALONIC ACID, RECOVERING THE PRECIPITATED AMIDE OF THE A-MEVALONIC ACID AND HYDROLYZING IT TO REMOVE THE AMIDE COMPONENT, AND RECOVERING THE A-MEVALONIC ACID.
Claim 2
Independent Claim
87 words
THE METHOD OF RECOVERING A-MEVALONIC ACID FROM AB-MEVALONIC ACID WHICH INCLUDES THE STEPS OF MIXING IN THE PRESENCE OF A SOLVENT (+)-A-PHENYL-1-NAPHTHALENEMETHYLAMINE WITH THE AB-MEVALONIC ACID LACTONE AT ELEVATED TEMPERATURES, REMOVING SAID SOLVENT AND RECOVERING THE RESULTING MIXTURE OF THE (+)-A-PHENYL-1-NAPHTHALENEMETHYLAMIDES OF THE A-AND THE B-MEVALONIC ACIDS, ADDING SAID MIXTURE OF AMIDES TO BENZENE TO THEREBY OBTAIN A SELECTIVE PRECIPITATION OF THE AMIDE OF A-MEVALONIC ACID, RECOVERING THE PRECIPITATED AMIDE OF THE A-MEVALONIC ACID AND HYDROLYZING IT TO REMOVE THE AMIDE COMPONENT, AND RECOVERING THE A-MEVALONIC ACID.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |