US3683023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-guanidine derivatives
Assignee: Individual
•
Filing: 1969-05-27
•
Granted: 1972-08-08
•
Expires: 1989-05-27
Abstract
Abstract Amino-guanidine derivatives constituting blood pressure regulating agents and being characterized by their ability to decrease blood pressure having the formula: WHEREIN R1 and R2 are each hydrogen or lower alkyl, and when joined together form alkylene containing two to three carbon atoms, and X is phenyl substituted by at least one halogen atom, and the salts thereof with pharmaceutically acceptable acids.
Inventors
- 👤 Werner Winter
- 👤 Max Thiel
- 👤 Kurt Stach
- 👤 Wolfgang Schaumann
- 👤 Karl Dietmann
- 👤 Klaus Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:26
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/44; C07D233/52; C07C; C07C281/00; C07C281/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
(2,4,6-trichloroanilino)-guanidine.
Claim 2
Dependent Claim
1 words
(2,4-dichloroanilino)-guanidine.
Claim 3
Dependent Claim
1 words
(2,6-dichloroanilino)-guanidine.
Claim 4
Dependent Claim
1 words
(4,fluoroanilino)-guanidine.
References Cited (Backward Citations)
US3383409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |