US3870722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Methyl-3-substituted-4-aryl isoquinolines
Assignee: Sandoz AG
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Filing: 1973-11-02
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Granted: 1975-03-11
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Expires: 1993-11-02
Abstract
Abstract 2-Methyl-3-substituted-4-aryl isoquinolines, e.g. 2-methyl-3tertiary butyl-4-phenyl-1,2,3,4-tetrahydroisoquinoline, prepared from corresponding 2-des-methyl isoquinoline intermediates, are useful as hypolipidemic agents.
Inventors
- 👤 William J Houlihan
- 👤 Jeffrey Nadelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:58
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/22; C07D217/24; C07D217/02; C07D217/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
5 words
A compound of the formula
Claim 4
Dependent Claim
5 words
A compound of the formula
Claim 5
Dependent Claim
8 words
The compound of claim 1 which is 3-tert.butyl-2-methyl-4-phenyl-1,2,3,4-tetrahydroisoquinoline.
Claim 6
Dependent Claim
9 words
The compound of claim 1 which is 3-tert.butyl-2-methyl-4-phenyl-1,2,3,4-tetrahydroisoquinoline hydrochloride.
Claim 7
Dependent Claim
8 words
The compound of claim 1 which is 3-tert.butyl-2,6-dimethyl-4-phenyl-1,2,3,4-tetrahydroisoquinoline.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |