Stable topiramate formulations
CA 2503147 A1 · Owner: Cilag Ag · Inventors: Hunziker, Thomas; Eivaskhani, Reza; Spycher, Rene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bi- or multi-phasic tablets comprising an effective amount of a moisture sensitive active ingredient, which in particular is topiramate wherein at , least one of the phases comprises hygroscopic gum material which preferably , is xanthan gum, and wherein none of the phases contains both moisture sensitive active ingredient and hygroscopic gum material.
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 December 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2025.
- 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.