Aliphatic esters as a solventless coating for pharmaceuticals
CA 2082137 C · Owner: Mcneil-Ppc, Inc. · Inventors: Bruce, Richard D.; Gowan, Walter G. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A physicochemically stable pharmaceutical matrix composition is provided comprising: a pharmaceutical active and a water insoluble aliphatic or fatty acid ester, preferably stearyl stearate; a taste mask carrier for pharmaceutical actives comprising a taste masking effective amount of an aliphatic or fatty acid ester; and a method for preparing a pharmaceutical matrix without the use of organic and/or volatile solvents comprising the steps of: melting an aliphatic or fatty acid ester; admixing at least one pharmaceutical active with the molten aliphatic or fatty acid ester; and solidifying the admixture to produce a pharmaceutical matrix composition. The matrix is composed of an aliphatic, …
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 November 4, 1992 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2014.
- 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.