US3705238A
Expired / Lapsed
US
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Antibiotics a204i and a204ii and method for production thereof
Assignee: Eli Lilly and Co
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Filing: 1970-09-14
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Granted: 1972-12-05
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Expires: 1990-09-14
Abstract
Abstract ANTIBIOTICS A204I AND A204II ARE CO-PRODUCED BY CULTURING STREPTOMYCES ALBUS NRRL 3384 IN AN AQUEOUS, NUTRIENT CULTURE MEDIUM AND ARE ISOLATED AS ANTIBIOTIC A204 MIXTURE VIA ETHYL ACETATE EXTRACTION OF FILTERED BROTH AND MYCELIUM FOLLOWED BY PURIFICATION OVER ACTIVATED CARBON. CHROMATOGRAPHY OF A204 MIXTURE AFFORDS SEPARATION OF A204I AND A204II AS INDIVIDUAL ANTIBIOTICS HAVING ANTICOCCIDIAL, INSECTICIDAL, ANTI-PPLO AS WELL AS ANTIMICROBIAL ACTIVITY.
Inventors
- 👤 Robert L Hamill
- 👤 Marvin M Hoehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:29
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/887
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |