Aqueous lecithin-based release aids and methods of using the same
CA 2213727 C · Owner: Buckman Laboratories International, Inc. · Inventors: Glover, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous release aid composition is disclosed that comprises a stable emulsion of an alcohol, a fatty acid or oil lecithin, a water soluble or , water dispersible surfactant and water. Methods of preparing such aqueous release aid compositions and methods of imparting release characteristics to various release surfaces and various viscous masses using the aqueous release aid compositions of the invention are also disclosed.
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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 February 12, 1996 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2018.
- 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.