US2656299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penicillin compositions
Assignee: Wyeth LLC
•
Filing: 1948-06-30
•
Granted: 1953-10-20
•
Expires: 1968-06-30
Abstract
No abstract record available.
Inventors
- 👤 Elias William
- 👤 Merrion Howard Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:02
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61K31/425; A61K31/429; A61K31/43
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A DRY ANTIBIOTIC COMPOSITION COMPRISING, A SPARINGL WATER-SOLUBLE SALT OF PENICILLIN AND A DRY, NON-TOXIC, STERILIZABLE SYNTHETIC GUM HYDROPHILIC SUSPENDING AGENT OF SMALL PARTICLE SIZE. THE MAJORITY OF THE PARTICLES RANGING FROM ABOUT 5 TO ABOUT 250 MICRONS.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |