US4399137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-Imidazol-1-yl-3-hydrazino-pyridazines, their preparation and antihypertensive use
Assignee: BASF SE
•
Filing: 1981-12-14
•
Granted: 1983-08-16
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Expires: 2001-12-14
Abstract
Abstract 6-Imidazol-1-yl-3-hydrazino-pyridazines, in which the imidazole ring is unsubstituted or is substituted by halogen or alkyl, their physiologically tolerated addition salts with acids, processes for their preparation and their use as drugs in the treatment of hypertonia.
Inventors
- 👤 Gerd Steiner
- 👤 Josef Gries
- 👤 Dieter Lenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:48
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; A; A61; A61P; A61P9/00; A61P9/12; C07D233/00; C07D233/54; C07D233/56; C07D249/00; C07D249/02; C07D249/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
1 words
3-Hydrazino-6-(2-methyl-imidazol-1-yl)-pyridazine.
Claim 2
Dependent Claim
1 words
3-Hydrazino-6-(2-methyl-imidazol-1-yl)-pyridazine.
Claim 3
Dependent Claim
1 words
3-Hydrazino-6-(2-ethyl-imidazol-1-yl)-pyridazine.
Claim 4
Dependent Claim
1 words
3-Hydrazino-6-(2-ethyl-imidazol-1-yl)-pyridazine.
Claim 5
Dependent Claim
1 words
3-(2-Isopropylidene-hydrazino)-6-(2-methyl-imidazol-1-yl)-pyridazine.
Claim 6
Dependent Claim
1 words
3-(2-Isopropylidene-hydrazino)-6-(2-methyl-imidazol-1-yl)-pyridazine.
Claim 7
Dependent Claim
1 words
3-(2-Isopropylidene-hydrazino)-6-(2-ethyl-imidazol-1-yl)-pyridazine.
Claim 8
Dependent Claim
1 words
3-(2-Isopropylidene-hydrazino)-6-(2-ethyl-imidazol-1-yl)-pyridazine.
Claim 9
Dependent Claim
45 words
A therapeutic agent for the treatment of hypertonia which comprises an effective amount of a compound of claim 1, 2, 3 or 4 or a physiologically tolerated additional salt thereof with an acid for lowering blood pressure combined with a pharmaceutically acceptable excipient and/or diluent.
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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |