Nifedipine pharmaceutical preparation
CA 2006778 C · Owner: Burghart, Walter · Inventors: Burghart, Walter; Burghart, Kurt
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nifedipine Pharmaceutical Preparation, Pharmaceutical preparation containing Nifedipine as the active substance together with a solution promoter such as, for example, copolyvidon or polyvinylpyrrolidone and/or glycerol-polyethyleneglycoloxystearate and with a solvent, such as, for example alcohols, in particular ethanol, or, polyalcohols as well as, optionally propelling agent for spraying in form of individually doseable sprays for sublingual administration and additionally containing in the sprayable preparation 0.5 to 30 percent by weight of benzyl alcohol .
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 December 28, 1989 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2011.
- 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.