US3004891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, aqueous solutions of sodium phosphite, sodium formaldehyde sulfoxylate, and dihydrostreptomycin sulfate
Assignee: Pfizer Inc
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Filing: 1959-09-17
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Granted: 1961-10-17
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Expires: 1979-09-17
Abstract
No abstract record available.
Inventors
- 👤 William W Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K47/00; A61K47/02; A61K47/06; A61K47/20; A61K9/00; A61K9/0012; A61K9/0019
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A STABLE PHARMACEUTICAL PREPARATION COMPRISING A SUBSTANTIALLY NEUTRAL, AQUEOUS SOLUTION OF DIHYDROSTREPTOMYCIN SULFATE AND FROM ABOUT 1 TO ABOUT 8% W./V. OF SODIUM PHOSPHITE AND FROM ABOUT 0.3 TO ABOUT 0.5% W./V. OF SODIUM FORMALDEHYDE SULFOXYLATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |