Aminosulphonylbenzamide derivatives as modulators of the activity of neuronal calcium channels
CA 2317536 A1 · Owner: Simmonds, Robin George · Inventors: Milutinovic, Sandra Ginette; Tupper, David Edward; Simmonds, Robin George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pharmaceutical compound of formula (I) in which the aminosulfonyl group is attached at the 3- or 4-position, and in which R1 is hydrogen C1-6 Alkyl, C3-, 10 cycloalkyl, C3-10 cycloalkyl-C1-4 alkyl or optionally substituted phenyl-C1- 4 alkyl, R2 is C1-6 alkyl, C3-10 cycloalkyl C3-10 cycloalkyl-C1-4 alkyl, optionally substituted phenyl-C1-4 alkyl or -(CH2)2NR5R6 where R5 and R6 are each hydrogen or C1-6 alkyl, and R3 and R4 are each C1-6 alkyl C3-10 , cycloalkyl, C3-10 cycloalkyl-C1-4 alkyl C3-6 alkenyl, optionally substituted , phenyl or optionally substituted phenyl-C1-4 alkyl or R1 and R2, or R3 and , R4, or R5 and R6 together with the nitrogen atom to which they are attached form a …
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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 January 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2021.
- 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.