Pharmaceutical formulations
CA 2230314 C · Owner: Dolan, Thomas Francis · Inventors: Humphrey, Michael John; Nichols, Donald John; Dolan, Thomas Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a pharmaceutical dosage form adapted for administration to the gastrointestinal tract of a patient comprising, darifenacin, or a pharmaceutically acceptable salt thereof and a , pharmaceutically acceptable adjuvant diluent or carrier, characterized in, that the dosage form is adapted to deliver at least 10 % by weight of the darifenacin, or the pharmaceutically acceptable salt thereof to the, lower gastrointestinal tract of the patient. The formulation minimizes unwanted side-effects and increases the bioavailability of darifenacin.
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 August 21, 1996 and granted June 24, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2018.
- 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.