Ion-strength independent sustained release pharmaceutical formulation
CA 2426666 A1 · Owner: Frijlink, Henderik W. · Inventors: Frijlink, Henderik W.; Gorissen, Henricus R. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to an optionally coated pharmaceutical hydrophilic gel forming matrix formulation comprising one or more active substances and having a prolonged release of said one or more active substances upon exposure to gastrointestinal fluids characterized in that , said release is substantially ion-strength independent. The invention is further related to a method of preparing this formulation which can be used in the administration of active substances for the treatment of a large number of disorders.
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 September 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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.