US3607651A
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Method for the biochemical isolation of l-menthol
Assignee: Takasago International Corp
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Filing: 1968-12-11
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Granted: 1971-09-21
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Expires: 1988-12-11
Abstract
Abstract Method for the biochemical isolation of l-menthol. Specifically, an improved method for the optical resolution of racemic menthol utilizing an enzyme, carboxylic ester hydrolase, produced by the action of a micro-organism belonging to the class of Penicillium, Gliocladium, Trichoderma, Geotrichum, Aspergillus, Pullaria, Fusarium, Absidia, Cunninghamella, Rhizopus, Actinomucor, Chlamyclomucor, Mucor, Gibberella, Streptomyces or Bacillus. The l-menthol may be utilized in perfumes, medicines, etc.
Inventors
- 👤 Tatsuo Moroe
- 👤 Satohika Hattori
- 👤 Akira Komatsu
- 👤 Yuzo Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/02; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/911; Y10S435/912; Y10S435/913; Y10S435/933; Y10S435/939
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A process as in claim 1, wherein said carboxylic acid is acetic acid.
Claim 2
Dependent Claim
22 words
A process as in claim 1, wherein said hydrolyzation is conducted at a temperature of from about 20 to about 45* C.
Claim 3
Dependent Claim
27 words
A process as in claim 1, wherein the amount of enzyme utilized is from about 0.1 to 0.5 percent, by weight, based on the enzyme reaction mixture.
Claim 4
Dependent Claim
32 words
A process as in claim 1, wherein the amount of organic carboxylic ester is in the range of from about 1 to about 10 percent by weight, based on the reaction mixture.
Claim 5
Dependent Claim
23 words
A process as in claim 1, wherein said enzyme is utilized in the form of actively growing micro-organism cells from the defined class.
Claim 6
Dependent Claim
23 words
A process as in claim 1, wherein said enzyme is utilized in the form of a cell free extract produced from said micro-organisms.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |