Benzimidazole compounds and their use as modulators of the gabaa receptor complex
CA 2218552 C · Owner: Fukuda, Yoshimasa · Inventors: Watjen, Frank; Sasaki, Toshiro; Teuber, Lene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present patent application discloses compounds having the formula or a pharmaceutically acceptable salt thereof or an oxide thereof wherein, R3 is, wherein, A, B and D each is CH or one or two of A, B and D is N and the others are CH;, R11 is phenyl, benzimidazolyl, or monocyclic heteroaryl all of which may be, substituted one or more times with substituents selected from alkyl alkoxy, halogen, CF3, amino, nitro, cyano acylamino, acyl, phenyl and monocyclic heteroaryl; one of R6 and R7 is hydrogen and the other is -CR'=NOR" wherein R' and R", each independently are hydrogen alkyl, alkenyl, alkynyl or phenyl. The compounds are useful for the treartment of various central nervous system …
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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 April 19, 1996 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2018.
- 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.