US2741604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penicillin salts
Assignee: Merck and Co Inc
•
Filing: 1954-08-19
•
Granted: 1956-04-10
•
Expires: 1974-08-19
Abstract
No abstract record available.
Inventors
- 👤 Dale P J Goldsmith
- 👤 Taub Rae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A SALT OF A PENICILIN AND 6A,3A-DIPHENYLTETRAHYDROIMIDAZ-(D)-IMIDAZOLE-2,5-(1H,3H)-DIIMINE.
Claim 2
Dependent Claim
7 words
A SALT OF A PENICILIN AND 6A,3A-DIPHENYLTETRAHYDROIMIDAZ-(D)-IMIDAZOLE-2,5-(1H,3H)-DIIMINE.
References Cited (Backward Citations)
US2681339A
Cited
US2631146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |