Patent US3914239A successfully refreshed from Google Patents.
US3914239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 5-lower-alkyl-pyridine-2-carboxylates
Assignee: Novartis Corp
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Filing: 1973-02-09
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Granted: 1975-10-21
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Expires: 1993-02-09
Abstract
Abstract Pyridines of the formula I wherein R1 is free hydroxyl, lower alkoxy, cycloalkoxy, aminolower alkoxy or lower alkoxy-lower alkoxy, free amino, hydroxyamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino or mono- or di-lower alkylamino, R2 is oxygen or sulphur, R3 and R4 are each alkoxy, free amino, mono- or di-lower alkylamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino, halogen or free hydroxyl, and either R3 or R4 can be hydrogen, and alk is an alkyl group with 3-10 carbon atoms, and their N-oxides, and salts are useful as dopamine- Beta hydroxylase inhibitors.
Inventors
- 👤 Hans Kuhnis
- 👤 Christian Egli
- 👤 Kurt Eichenberger
- 👤 Phyllis Roberta Hedwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:37
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; C07D213/04; C07D213/60; C07D213/61; C07D213/62; C07D213/63; C07D213/78; C07D213/79; C07D213/81; C07D213/83
Claims Analysis
Total Claims: 6
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
8 words
A compound of claim 1 having the formula
Claim 4
Dependent Claim
8 words
A compound of claim 1 having the formula
Claim 5
Dependent Claim
15 words
A compound as claimed in claim 1, being 2-carboxy-4-methoxy-5-n-butyl-pyridine, or a therapeutically usable salt thereof.
Claim 6
Dependent Claim
29 words
A compound as claimed in claim 1, being 2-carboxy-4,6-dichloro-5-n-butyl-pyridine, 2-carboxy-4-methoxy-5-n-butyl-6-chloro-pyridine, 2-carboxy-4-methoxy-5-n-butyl-pyridine, 2-carboxy-4-n-propoxy-5-n-butyl-pyridine or 2-carboxy-4-ethoxy-5-n-butyl-pyridine, 2-methoxycarbonyl-5-n-butyl-6-methoxy-pyridine, 2-carboxy-5-n-butyl-6-methoxy-pyridine, 2-methoxycarbonyl-4-methoxy-5-n-butyl-pyridine, 2-carboxy-4-methoxy-5-isoamyl-pyridine, 2-carboxy-4-methoxy-5-n-amyl-pyridine, or 2-carboxy-4-chloro-5-n-butyl-6-methoxy-pyridine, or 2-carboxy-4,6-dimethoxy-5-n-butyl-pyridine or a therapeutically usable salt thereof.
References Cited (Backward Citations)
GB1219176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |