Epibatidine and derivatives, compositions and methods of treating pain
CA 2131365 C · Owner: Spande, Thomas F. · Inventors: Spande, Thomas F.; Garraffo, Hugo M.; Daly, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to compounds compositions and methods of treating pain and derivatives that have potent, analgetic activity. The compounds have formula (I) wherein R1 is selected from H lower alkyl, C3-C9 cycloalkyl, acyl, and C3-C9 cycloalkylalkyl, haloalkyl, alkenyl alkynyl, hydroxyalkyl, or C3-C8 cycloalkenyl or C3-C8 cycloalkynyl; and wherein R is selected from cycloalkyl, aryl, heteroaryls (selected from the group consisting of pyridyl thienyl, furanyl, imidazolyl, pyrazinyl and pyrimidyl) or phenoxy and wherein said R groups can be substituted with hydroxyl C1-C6 lower alkyl, C2-C6, alkenyl, C1-C6 lower alkoxyl halo, C1-C6 haloalkyl, amino, C1-C6 alkylamino and …
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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
- Filed March 2, 1993 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2015.
- 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.