Therapeutically useful tetralin derivatives
CA 1331191 C · Owner: Svensson, Kjell Anders Ivan · Inventors: Andersson, Bengt Ronny; Wikstrom, Hakan Vilhelm; Svensson, Kjell Anders Ivan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is therapeutically useful tetralins and pharmaceuticallyacceptable acid addition salts thereof of the formula wherein, YR1 is OR1 at the 8 position where R1 is -CH2-(C3-8 cycloalkyl); R2 is hydrogen or C1-3 alkyl;, R3 is -CH2-(C3-8 cycloalkyl); R4 is hydrogen, C1-8 alkyl, -CH2-(C3-4 cycloalkyl) -(CH2)m-R5 or, -CH2-CH2-X-(CH2)nCH3, n is zero to 3 and m is 2 or 3; X is oxygen or sulfur;, R5 is phenyl, C1-3 alkoxy, C1-3 alkyl 2-thiophene, 3-thiophene, or phenyl, substituted with one or two substituent groups selected from chlorine bromine or fluorine; and with the proviso that when R3 contains more than four carbon atoms and R4 is alkyl, said alkyl contains from 1 to 3 carbon …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.