Pharmaceutical formulation composed of a polymer blend and an active compound for time-controlled release
CA 2395892 C · Owner: Rutgers, The State University · Inventors: Kohn, Joachim B.; Schachter, Deborah M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A formulation containing a biologically active compound having a structure with hydrogen bonding sites blended with a first polymer having a structure with complementary hydrogen bonding sites and a second polymer that degrades to form degradation products that promote the release of the active compound from the first polymer.
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 2, 2001 and granted June 3, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 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.