Patent US4196292A successfully refreshed from Google Patents.
US4196292A
Expired / Lapsed
US
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6-Substituted amiloride derivatives
Assignee: Merck and Co Inc
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Filing: 1977-06-29
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Granted: 1980-04-01
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Expires: 1997-06-29
Abstract
Abstract N-amidino-3,5-diamino-6-substituted-2-pyrazinecarboxamides and a process for their synthesis.
Inventors
- 👤 Otto W. WOLTERSDORF, Jr.
- 👤 Susan J. deSolms
- 👤 Edward J. Cragoe, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:40
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C07D241/26; A; A01; A01N; A01N31/00; A01N31/02; A61; A61P; A61P7/00; A61P7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A compound of the formula: ##STR3##
Claim 2
Dependent Claim
6 words
A compound of the formula: ##STR3##
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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |