US3454557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-(alpha-guanidino acylamino)-penicillanic acid compounds
Assignee: Merck and Co Inc
•
Filing: 1964-07-02
•
Granted: 1969-07-08
•
Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Patchett
- 👤 Edward F Rogers
- 👤 William J Leanza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:45
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3157673A
Cited
GB810569A
Cited
US2941995A
Cited
US2951839A
Cited
US3174964A
Cited
US3162651A
Cited
US3173911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |