Tetrazole excitatory amino acid receptor antagonists
CA 1332239 C · Owner: Ornstein, Paul Leslie · Inventors: Ornstein, Paul Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides novel tetrazole derivatives useful as excitatory amino acid receptor antagonists and in treating a variety of associated nervous system disorders. The novel tetrazole derivatives are compounds of the formula, I, wherein:, R1 is -?OR3 -?N(R4)2, , or, ;, R2 is hydrogen or C1-C3 alkyl; n is 0, 1, 2 or 3;, m is 0 or 1;, provided that the sum of m and n is 0 1, 2, or 3;, R3 is hydrogen, C1-C4 alkyl phenyl or an, oral ester forming group; Y is -CH=; and, each R4 is independently hydrogen C1-C4 alkyl, or phenyl;, or pharmaceutically acceptable salts thereof.
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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 October 4, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 4, 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.