Pharmaceutical powder composition containing non-ionic cellulose ether derivative and a chitin-derived polymer
CA 2136607 C · Owner: Koochaki, Patricia E. · Inventors: Koochaki, Patricia E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pharmaceutical composition in powder form comprising a drug and a pharmaceutically-acceptable carrier, the carrier comprising a non-ionic cellulose ether derivative and a chitin-derived polymer. The pharmaceutical composition provides a high availability of the active ingredient and displays improved adhesion characteristics.
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 April 29, 1993 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2015.
- 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.