US3577424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-phenyl-8-amino tetrahydroisoquinolines
Assignee: Hoechst AG
•
Filing: 1969-10-20
•
Granted: 1971-05-04
•
Expires: 1989-10-20
Abstract
Abstract 4-PHENYL-8-AMINO TETRAHYDROISOQUINOLINES HAVING CENTRALLY STIMULATING AND THYMOLEPTIC ACTION. METHODS FOR THEIR MANUFACTURE BY RING CLOSURE, ACYLATION, OR REDUCTION. PHARMACEUTICAL COMPOSITIONS CONTAINING THESE COMPOUNDS.
Inventors
- 👤 Gustav Ehrhart
- 👤 Karl Schmitt
- 👤 Irmgard Hoffmann
- 👤 Heinrich Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/12; C07D217/14; C07D217/16; C07D217/02; C07D217/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |