Amine derivatives
CA 1281036 C · Owner: Middlemiss, David · Inventors: Finch, Harry; Dowle, Michael D.; Middlemiss, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides compounds of the general formula (3), (I), and physiologically acceptable acid addition salts metabolically labile esters and solvates thereof in which R1 represents a halogen atom or a methyl ethyl, n-propyl or n-butyl group;, R2, R3 R4 and R5 each represent hydrogen atoms or one or two of R2 R3, R4 and R5 represent a methyl or ethyl group;, X represents a C4-7 alkylene chain optionally substituted by one or more C1-4 alkyl or hydroxyl groups; or optionally containing one or two double or triple bonds; or optionally interrupted by an oxygen or sulphur atom, or by a sulphone (-SO2-) or urea (-NHCONH-) group; and, Y represents a phenyl ring optionally carrying one to …
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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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- 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.