Imidazo-benzodiazepines and their use in the treatment of memory or cerebral senescence disorders
CA 1310638 C · Owner: Hedgecock, Charles J. R. · Inventors: Hedgecock, Charles J. R.; Gardner, Colin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are compounds of formula (I): (I), wherein R1 represents a phenyl group a C4-C6 cycloalkyl, group or a group of formula (II): (II), (in which R4 represents hydrogen or C1-C5 alkyl: R5 represents hydrogen or C1-C5 alkyl; and R6 represents hydrogen, C1-C5 alkyl, phenyl, halogen C2-C5, alkoxycarbonyl, cyano, amido or C1-C5 mono- or dialkylamido) R2 and R3, which may be identical or different each, represents a hydrogen atom, a C1-C5 alkyl group or a C2-C5 cycloalkyl group, or R2 and R3 together represent a C3-C5 alkylene group; and X and Y, which may be identical or different, each represents a hydrogen atom a halogen atom, a nitro,azido, nitrile or trifluoromethyl group or an alkyl …
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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 November 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 2009.
- 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
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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.