Patent US3673189A successfully refreshed from Google Patents.
US3673189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetracyclic isoquinoline derivatives
Assignee: Wyeth Holdings LLC
•
Filing: 1971-01-05
•
Granted: 1972-06-27
•
Expires: 1991-01-05
Abstract
Abstract Compounds with the structures ARE PREPARED FROM HOMOLOGOUS INTERMEDIATES AND ARE USEFUL AS ANALGESIC AND ANTIINFLAMMATORY AGENTS.
Inventors
- 👤 William Vincent Curran
- 👤 Leon Goldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:52
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/20; C07D217/00; C07D217/12; C07D217/14; C07D217/16; C07D221/04; C07D221/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
A compound selected from the group consisting of those of the formula:
Claim 2
Dependent Claim
7 words
The compound ( + or - )-1,2,3,4-tetrahydro-6-methoxy-1-(2-(4-methoxy-1,4-cyclohexadien-1-yl)ethyl)-2-methyl-7-isoquinolinol.
Claim 3
Dependent Claim
8 words
The compound ( + or - )-1,2,3,4-tetrahydro-6-methoxy-1-(2-(4-methoxy-1,4-cyclohexadien-1 -yl)methyl)-2-methyl-7-isoquinolinol.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |