US3928384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzo{8 b{9 thienyl acetic acid esters
Assignee: Sanofi SA
•
Filing: 1973-05-07
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Granted: 1975-12-23
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Expires: 1993-05-07
Abstract
Abstract AND THE PHARMACEUTICALLY ACCEPTABLE ACID ADDITION, ALKALI METAL AND AMMONIUM SALTS THEREOF, WHEREIN R1 represents hydrogen, a cyclohexyl group, a dialkylaminoalkyl group or an alkyl radical in which each alkyl radical is straight- or branched-chain and has one to four carbon atoms and R2 represents a fluorine, chlorine or bromine atom or a methoxy group, useful as antiarhritic agents. Benzo(b)thiophene derivatives represented by the general formula:
Inventors
- 👤 Marcel Descamps
- 👤 Durme Etienne Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/50; C07D333/52; C07D333/54; C07D333/60; C07D333/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A BENZO THIOPHENE COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
7 words
A BENZO THIOPHENE COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
17 words
A benzo thiophene compound as defined by claim 1 wherein R1 is beta-dimethylaminoethyl and R2 is chlorine.
Claim 4
Dependent Claim
17 words
A benzo thiophene compound as defined by claim 1 wherein R1 is gamma-dimethylaminopropyl and R2 is chlorine.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |