Expired Canadian patentCanada
Novel derivatives of 4,4'-dithiobis-(3-aminobutane-1-sulfonates) and compositions comprising the same
CA 2533432 C · Owner: Roques, Bernard Pierre · Inventors: Llorens-Cortes, Catherine; Inguimbert, Nicolas; Fournie-Zaluski, Marie-Claude
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to derivatives of 4,4'-dithiobis-(3-aminobutane-1-sulfonates) of formula (1) of use for the treatment and prevention of primary and secondary arterial hypertension.
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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 August 6, 2004 and granted May 21, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 6, 2004
GrantedMay 21, 2013
Term endedAugust 6, 2024
Patent numberCA 2533432 C
Classification (IPC)C07C323/58 +2 more
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.