Benzimidazole compounds, their use and preparation
CA 2119511 C · Owner: Neurosearch A/S · Inventors: Teuber, Lene; Axelsson, Oskar; Watjen, Frank
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 see Formula I, or a pharmaceutically acceptable salt thereof wherein R3, R4, R6 and R7 each have the meanings set forth in the specification. The compounds are useful for the treartment of various central nervous system disorders such as epilepsy and other convulsive disorders anxiety, sleep, disorders and memory disorders.
Read the whole patent
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 21, 1994 and granted July 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2016.
- 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.