Controlled release pharmaceutical compositions for the oral administration containing nifedipine as active substance
CA 2216277 C · Owner: Valducci, Roberto · Inventors: Valducci, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Controlled release pharmaceutical compositions for the oral administration of nifedipine comprising an amorphous coprecipitate of nifedipine and polyvinylpyrrolidone and suitable excipients the, release being modulable from 8 to 24 hours modifying the amount and the kind of used excipients. Said compositions show a high solubility and bioavailability in addition to the advantage of the controlled release.
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 22, 1997 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.