Benzimidazole derivatives
CA 2207348 C · Owner: Volkmann, Robert A. · Inventors: Volkmann, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are benzimidazole derivatives having the formula:, (see fig. I), wherein, preferably B is diethylmethyl, Y is hydrogen or, methyl R1 is ethyl, methyl or chloro and R2, R3 and R4 are each methyl. These compounds and their pharmaceutically acceptable salts are useful in the treatment of CNS and stress related 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 June 9, 1997 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2019.
- 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.