Process for preparing non-hygroscopic sodium valproate composition
CA 2434226 A1 · Owner: Friedman, Michael · Inventors: Levitt, Barrie; Friedman, Michael; Barder, Maya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to non-hygroscopic oral pharmaceutical compositions of a salt of valproic acid, and processes for preparing the compositions. The non-hygroscopic phamraceutical compositions are prepared by blending a hygroscopic salt of valproic acid, carbomer and a non-hygroscopic additive.
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 January 24, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2024.
- 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.