US2767168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of streptomycin
Assignee: Bristol Laboratories Inc
•
Filing: 1953-02-20
•
Granted: 1956-10-16
•
Expires: 1973-02-20
Abstract
No abstract record available.
Inventors
- 👤 Lee C Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:59
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/238
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THE PROCESS OF PURIFYING STREPTOMYCIN COMPRISING REACTING IN ALKALINE SOLUTION STREPTOMYCIN WITH A DIAMINE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
THE PROCESS OF PURIFYING STREPTOMYCIN COMPRISING REACTING IN ALKALINE SOLUTION STREPTOMYCIN WITH A DIAMINE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
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Cited
US2607770A
Cited
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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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |