Patent US3637697A successfully refreshed from Google Patents.
US3637697A
Expired / Lapsed
US
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6-amino-1 2-dihydro-1-hydroxy-2-iminopyrimidines
Assignee: Pharmacia and Upjohn Co
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Filing: 1969-02-20
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Granted: 1972-01-25
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Expires: 1989-02-20
Abstract
Abstract 6-AMINO-1,2-DIHYDRO-1HYDROXY - 2 - IMINOPYRIMIDINES, THEIR CARBOXYACYLATED COUNTERPARTS, AND THE CORRESPONDING ACID ADDITION SALTS THEREOF ARE DISCLOSED. THESE COMPOUNDS, USEFUL INTER ALIA AS ANTIHYPERTENSIVE AGENTS, ARE SUBSTITUTED IN THE 4-POSITION AND IN THE 5-POSITION, THE SUBSTITUENT IN THE 4-POSITION BEING A SECONDARY OR TERTIARY AMINO MOIETY.
Inventors
- 👤 William C Anthony
- 👤 Joseph J Ursprung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:27
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/535; A61K31/54; A61K31/55; C07D239/48; C07D239/50
Claims Analysis
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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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |