Method for obtaining aqueous formulations of oxidation-sensitive active principles
CA 2415403 C · Owner: Pharmatop Scr · Inventors: Fredj, Daniele; Dietlin, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the field of organic chemistry and more particularly that of therapeutic chemistry. More precisely it concerns a method for obtaining aqueous formulations of easily oxidizable active principles in particular phenols, stable over a prolonged period which consists in advanced bubbling deoxygenation with an inert gas and/or vacuumizing them while protecting them against possible oxygen uptake by maintaining them under inert gas atmosphere by filling under inert gas into bottles previously made air-free by inert gas blowing then in subjecting them when they are being closed to a vacuum so as to obtain in the bottle a pressure of not more than 65.000 Pa thereby obtaining …
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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 June 6, 2001 and granted May 24, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2023.
- 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.