US3661892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a new antibiotic sf-733 substance
Assignee: Meiji Seika Kaisha Ltd
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Filing: 1968-12-03
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Granted: 1972-05-09
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Expires: 1988-12-03
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF AN ANTIBIOTIC SF-733 SUBSTANCES WHICH COMPRISES CULTIVATING SF-733 STRAIN OF STREPTOMYCES THERMOFLAVUS IN AN AQUEOUS NUTRIENT MEDIUM UNDER SUBMERGED AEROBIC CONDITION AND RECOVERING THE ACTIVE INGREDIENT, AMORPHOUS FREE BASE OF SF-733 SUBSTANCE FROM THE MEDIUM AND MORE PARTICULARLY OBTAINING FREE BASE CRYSTAL OF SF-733 SUBSTANCE BY PASSING SAID AMORPHOUS SUBSTANCE THROUGH ETHANOL-SOLVATE STATE ON THE WAY TO CRYSTALLIZATION.
Inventors
- 👤 Takashi Shomura
- 👤 Norio Ezaki
- 👤 Takashi Tsuruoka
- 👤 Tomizo Niwa
- 👤 Eiichi Akita
- 👤 Taro Niida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:19
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/222; C07H15/226; C07H15/228; C07H15/23; C07G; C07G11/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 0
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |