N-(mercaptoacyl)amino acids, methods of their preparation and therapeutic use, and pharmaceutical compositions containing them
CA 2121801 A1 · Owner: Fournie-Zaluski, Marie-Claude · Inventors: Roques, Bernard Pierre; Fournie-Zaluski, Marie-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a compound of formula (I) wherein R represents a hydrogen atom or an acyl aroyl or, cycloalkylcarbonyl radical or a residue of formula (Ia); R1 represents an alkyl radical; R2 represents an aryl or heteroaryl radical or R1 represents an alkylene chain attached to a carbon atom in an ortho position of the R2 aryl or heteroaryl radical relative to a carbon of the R2 aryl or heteroaryl radical linked to the propanoyl moiety; R3 represents a hydrogen atom or an alkyl aryl, alkoxy or aryloxy radical; and R' represents a hydrogen atom or an alkyl, aralkyl, acyl or aroyl radical; and the pharmaceutically acceptable salts thereof. The invention is also directed …
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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 October 21, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2014.
- 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.