US3974184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microbial production of certain isoflavones
Assignee: Microbial Chemistry Research Foundation
•
Filing: 1974-07-23
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Granted: 1976-08-10
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Expires: 1994-07-23
Abstract
Abstract This invention relates to the novel compounds 3',5,7-trihydroxy-4',6-dimethoxy-isoflavone, 3'5,7-trihydroxy-4',8-dimethoxy-isoflavone and 3',7-dihydroxy-4',6,8-trimethoxy-isoflavone which are powerful inhibitors of catechol-O-methyl transferase (COMT) and to their production by fermentation of Actinomyces roseolus.
Inventors
- 👤 Hamao Umezawa
- 👤 Tomio Takeuchi
- 👤 Hideo Chimura
- 👤 Tsutomu Sawa
- 👤 Masa Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/34; C07D311/38; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/826
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A compound having the formula ##SPC9##
Claim 2
Dependent Claim
6 words
A compound having the formula ##SPC9##
Claim 3
Dependent Claim
9 words
The compound of claim 1 having the formula ##SPC10##
Claim 4
Dependent Claim
9 words
The compound of claim 1 having the formula ##SPC11##
References Cited (Backward Citations)
US2350804A
Cited
US2764596A
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US3352754A
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US3598840A
Cited
US3704323A
Cited
US3661890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |