Amino acid derivatives
CA 2044564 A1 · Owner: Neidhart, Werner · Inventors: Muller, Marcel; Heitz, Marie-Paule; Wostl, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The compounds of the formula I, wherein A, B, X, Y, R1, R2, R3. R4 and R5 have the significance given in claim 1 in the form of optically pure diastereomers mixtures of, diastereomers, diastereomeric racemates or mixtures of diastereomeric racemates as well as pharmaceutically usable salts thereof inhibit the activity of the natural enzyme renin and can accordingly be used in the form of pharmaceutical preparations in the control or prevention of high blood pressure and cardiac insufficiency. They can be manufactured according to various methods which are known per se.
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 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2013.
- 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.