US3646008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzothiazepine derivatives
Assignee: Tanabe Pharma Corp
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Filing: 1970-01-09
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Granted: 1972-02-29
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Expires: 1990-01-09
Abstract
Abstract 2-(4 METHOXYPHENYL)-3-HYDROXY-5-(B-DIMETHYLAMINOETHYL)-2,3-DIHYDRO-1,5 -BENZOTHIAZEPIN-4(5H)-ONE IS REACTED WITH A LOWER ALKYL HALFORMATE HAVING THE FORMULA X-COOR WHEREIN X IS A HALOGEN ATOM AND R IS A LOWER ALKYL RADICAL. THE RACTION IS CONDUCTED IN THE PRESENCE OF A BASE. A BENZOTHIAZEPINE DERIVATIVE HAVING THE FORMULA 2-(4-(CH3-O-)PHENYL),3-(R-O-COO-),4-(O=),5-((CH3-)2-N-CH2- CH2-)-2,3,4,5-TETRAHYDRO-1,5-BENZOTHIAZEPINE WHEREIN R IS AS DEFINIED ABOVE, IS PRODUCED. THE BENZOTHIAZEPINE DERIVATIVE AND ITS PAHRMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS ARE USEFUL AS CORONARY VASODILATORS.
Inventors
- 👤 Hiroshi Kugita
- 👤 Satoshi Takeo
- 👤 Masanori Sato
- 👤 Taku Nagao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:11
CPC Classifications
C; C07; C07D; C07D281/00; C07D281/02; C07D281/04; C07D281/08; C07D281/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |