US3972930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminocyclitol antibiotics
Assignee: STWB Inc
•
Filing: 1975-02-18
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Granted: 1976-08-03
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Expires: 1995-02-18
Abstract
Abstract Aminocyclitol analogs of gentamicin C 1 , C 2 and C 1a and the corresponding compounds acylated on the 1-, 3- and 2'-amino groups with an ω-amino-α-hydroxy-lower-alkanoyl group are prepared by culturing a nutrient medium containing carbohydrates, a source of assimilable nitrogen, essential salts and an added aminocyclitol with a mutant of Micromonospora purpurea and acylating the product with an ester of an ω-(N-benzyloxycarbonyl)amino-α-hydroxy-lower-alkanoic acid followed by catalytic hydrogenolysis of the benzyloxycarbonyl group.
Inventors
- 👤 Sol J. Daum
- 👤 Robert L. Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/222; C07H15/226; C07H15/234; C07H15/236; C07D; C07D231/00; C07D231/54; C07D303/00; C07D303/02; C07D303/12; C07D303/14; C07D498/00; C07D498/02; C07D498/04; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/863
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A compound having the formula: ##SPC6## where R 4 is fluorine or iodine.
Claim 2
Dependent Claim
13 words
A compound having the formula: ##SPC6## where R 4 is fluorine or iodine.
References Cited (Backward Citations)
US3112345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |