Guanidino-substituted compounds
CA 2188452 C · Owner: Rakhit, Sumanas · Inventors: Slassi, Abdelmalik; Rakhit, Sumanas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel guanidino-substituted compounds are described having general formula (I) or a salt, hydrate or solvate thereof, in which X is selected from C O, N and , S; R1 and R3 are independently -(W)a-(R6)b-Z wherein a and b are , independently 0 or 1; W is NH O or S; R6 is C1-8alkylene in which one or two non-adjacent, intervening carbon atoms thereof is optionally replaced with nitrogen or oxygen; and Z is H, OH or -NH-C(NH)-NH2; provided that when b is 0 then Z is H; R2 is selected from H and OH; and R4 and R5 are independently C1- 8alkylene in which one of the carbon atoms thereof is optionally replaced with nitrogen or oxygen. Compounds in accordance with formula (I) have been found …
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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 28, 1995 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2017.
- 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.