US3953456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbostyril derivatives and process for preparing the same
Assignee: Otsuka Pharmaceutical Co Ltd
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Filing: 1973-12-14
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Granted: 1976-04-27
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Expires: 1993-12-14
Abstract
Abstract 2-Hydroxy-3-alkylaminopropoxycarbostyrils represented by the formula (I) ##SPC1## wherein R represents a straight or branched chain alkyl group having 1 to 4 carbon atoms useful as β-adrenergic blocking agents and a process for preparing the same are disclosed.
Inventors
- 👤 Kazuyuki Nakagawa
- 👤 Shiro Yoshizaki
- 👤 Nanami Murakami
- 👤 Hideo Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/227; A; A61; A61P; A61P9/00; A61P9/06; A61P9/08; A61P9/10; C07D215/24; C07D215/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
35 words
A 5- or 8- (2-Hydroxy-3-alkylamino)propoxycarbostyril compound represented by the formula (I): ##SPC4## wherein R represents a straight or branched alkyl group having 1 to 4 carbon atoms, and the pharmaceutically acceptable acid addition salts thereof.
Claim 2
Dependent Claim
35 words
A 5- or 8- (2-Hydroxy-3-alkylamino)propoxycarbostyril compound represented by the formula (I): ##SPC4## wherein R represents a straight or branched alkyl group having 1 to 4 carbon atoms, and the pharmaceutically acceptable acid addition salts thereof.
Claim 3
Dependent Claim
5 words
5-(2-Hydroxy-3-isopropylamino)propoxycarbostyril according to claim 1.
Claim 4
Dependent Claim
5 words
5-(2-Hydroxy-3-tert-butylamino)propoxycarbostyril according to claim 1.
Claim 5
Dependent Claim
5 words
8-(2-Hydroxy-3-tert-butylamino)propoxycarbostyril according to claim 1.
Claim 6
Dependent Claim
5 words
8-(2-Hydroxy-3-isopropylamino)propoxycarbostyril according to claim 1.
Claim 7
Dependent Claim
5 words
8-(2-Hydroxy-3-sec-butylamino)propoxycarbostyril according to claim 1.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |