US2931756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dihydrostreptomycin
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1960-04-05
•
Granted: 1960-04-05
•
Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Nakazawa Koiti
- 👤 Shibata Motoo
- 👤 Tanabe Kazuo
- 👤 Yamamoto Hiroichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/44; C12P19/46; C12P19/54; C12N; C12N1/00; C12N1/20; C12N1/205; C12P21/00; C12P21/02; C12R; C12R2001/00; C12R2001/01; C12R2001/465; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PRODUCING DIHYDROSTREPTOMYCIN, WHICH COMPRISES CULTIVATING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A DIHYDROSTREPTOMYCIN-PRODUCING STRAIN OF STREPTOMYCES HUMIDUS AND ITS NATURAL MUTANTS, INDUCED MUTANTS AND VARIANTS IN AN AQUEOUS NUTRIENT-CONTAINING MEDIUM UNDER AEROBIC CONDTIONS UNTIL SUBSTANTIAL ANTIBACTERIA ACTIVITY DUE TO ACCUMULATION OF FORMED SIHYSROSTREPTOMYCIN IS IMPARTED TO SAID MEDIUM.
Claim 2
Dependent Claim
53 words
A PROCESS FOR PRODUCING DIHYDROSTREPTOMYCIN, WHICH COMPRISES CULTIVATING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A DIHYDROSTREPTOMYCIN-PRODUCING STRAIN OF STREPTOMYCES HUMIDUS AND ITS NATURAL MUTANTS, INDUCED MUTANTS AND VARIANTS IN AN AQUEOUS NUTRIENT-CONTAINING MEDIUM UNDER AEROBIC CONDTIONS UNTIL SUBSTANTIAL ANTIBACTERIA ACTIVITY DUE TO ACCUMULATION OF FORMED SIHYSROSTREPTOMYCIN IS IMPARTED TO SAID MEDIUM.
References Cited (Backward Citations)
US2498574A
Cited
US2493489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |