US2827498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of geometrical isomers of menthol to racemic menthol by silica catalysts
Assignee: National Cylinder Gas Co
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Filing: 1957-05-27
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Granted: 1958-03-18
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert R Bottoms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
C; C07; C07C; C07C35/00; C07C35/02; C07C35/08; C07C35/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF CONVERTING A GEOMETRICAL ISOMER OF MENTHOL TO METHOL WHICH COMPRISES HEATING SAID GEOMETRICAL ISOMER OF MENTHOL WITH A SILICA-CONTAINING MATERIAL AT A TEMPERATURE NOT GREATER THAN ABOUT 210*C.
Claim 2
Independent Claim
31 words
A METHOD OF CONVERTING A GEOMETRICAL ISOMER OF MENTHOL TO METHOL WHICH COMPRISES HEATING SAID GEOMETRICAL ISOMER OF MENTHOL WITH A SILICA-CONTAINING MATERIAL AT A TEMPERATURE NOT GREATER THAN ABOUT 210*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |