Stable formulation of analapril salt, a process for the preparation thereof and the use thereof
CA 2083683 C · Owner: Rotar, Ales · Inventors: Rotar, Ales; Merslavic, Marjo; Razen, Jozica
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a stable formulation of enalapril salt of the formula I (see formula I), which is prepared in such manner that a compound of formula II (see formula II), is suspended in demineralized water and a stoichiometric amount of the corresponding, sodium compound such as sodium carbonate sodium hydrogen carbonate or, sodium hydroxide is added thereto to this enalapril sodium salt prepared in situ of, the formula I, (see formula III) formulating additives are added, the whole is homogenized and formulated.
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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 November 24, 1992 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 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.