Transdermal nitroglycerin patch with penetration enhancers
CA 2064845 A1 · Owner: Rudnic, Edward M. · Inventors: Govil, Sharad K.; Sterner, Dale G.; Rudnic, Edward M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transdermal nitroglycerin patch exhibiting superior nitroglycerin skin penetrating characteristics comprising a percutaneous penetration enhancer is disclosed, wherein the penetration enhancer may be one or more of N-methyl-2-pyrrolidone oleic acid, oleyl, alcohol, linoleic acid isopropyl linoleate, azone and butanediol. Also disclosed is a transdermal patch design comprising two concentric rings, wherein the concentrations of nitroglycerin and the permeability enhancer are varied.
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 15, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2012.
- 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.