Patent US3579524A successfully refreshed from Google Patents.
US3579524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminoalkyl derivatives of phthalimidines
Assignee: Bayer Corp
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Filing: 1968-06-05
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Granted: 1971-05-18
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Expires: 1988-06-05
Abstract
Abstract 2-AMINOALKYL DERIVATIVES OF PHTHALIMIDINE THAT ARE USEFUL AS ANTIHYPERTENSIVE AGENTS. PREPARED BY REACTING PHTHALIC ANHYDRIDE WITH A SUITABLE AMINE AND SELECTIVELY REDUCING ONE OF THE OXO GROUPS OF THE RESULTING PHTHALIMIDE TO FORM THE DESIRED COMPOUND.
Inventors
- 👤 John William Van Dyke Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:57
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; C; C07; C07D; C07D401/00; C07D401/02; C07D401/06; C07D403/00; C07D403/02; C07D403/06; C07D413/00; C07D413/02; C07D413/06
Claims Analysis
Total Claims: 0
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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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |