US2746959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diphenylethylenediamine-penicillin salt
Assignee: Wyeth LLC
•
Filing: 1953-06-02
•
Granted: 1956-05-22
•
Expires: 1973-06-02
Abstract
No abstract record available.
Inventors
- 👤 William F Bruce
- 👤 Roy S Hanslick
- 👤 Meier E Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:09
CPC Classifications
C; C07; C07D; C07D499/00; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
A PENICILLIN SALT OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2578536A
Cited
US2627491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |