Patent US3620918A successfully refreshed from Google Patents.
US3620918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the biochemical isolation of 1-menthol
Assignee: Takasago International Corp
•
Filing: 1969-11-21
•
Granted: 1971-11-16
•
Expires: 1989-11-21
Abstract
Abstract Method for the biochemical isolation of 1-menthol. Specifically, an improved method for the optical resolution of racemic menthol utilizing an enzyme, carboxylic ester hydrolase, which is produced by micro-organism belonging to the class of Candida, Saccharomyces, Hansenula, Rhodotorula, Torulopsis, Schizosaccharomyces, Pichia, Sporobolomyces, Debaryomyces, Nadsonia, Trichosporon, Brettanomyces, and Cryptococcus. The 1-menthol may be utilized in perfumes, medicines, etc.
Inventors
- 👤 Tatsuo Moroe
- 👤 Satohiko Hattori
- 👤 Akira Komatsu
- 👤 Yuzo Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:46
CPC Classifications
A; A47; A47B; A47B95/00; C; C07; C07C; C07C35/00; C07C35/02; C07C35/08; C07C35/12; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/921; Y10S435/93; Y10S435/938; Y10S435/94; Y10S435/944
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
A process as in claim 1, wherein said organic 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 25* 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 2 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
22 words
A process as in claim 1, wherein said enzyme is utilized in the form of a cell-free extract produced from said microorganisms
References Cited (Backward Citations)
US3256156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |