US2631146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biguanide salts of penicillin
Assignee: Wyeth Holdings LLC
•
Filing: 1952-11-13
•
Granted: 1953-03-10
•
Expires: 1972-11-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Weidenheimer
- 👤 Ritter Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE SALT OF PENICILLIN AND A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
10 words
THE SALT OF PENICILLIN AND A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |