Lipid vesicle containing water-in-oil emulsions
CA 2108039 C · Owner: Wallach, Donald F. H. · Inventors: Wallach, Donald F. H.; Albert, Elizabeth C.; Mathur, Rajiv
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention features water-in-oil emulsions having intact lipid vesicles dispersed in the water or aqueous phase. Methods of making the emulsions are also disclosed. The preferred vesicles for use in the emulsions are paucilamellar lipid vesicles, most preferably those having nonionic amphiphiles as their major structural component. The water-in-oil emulsions are useful in cosmetics, pharmaceuticals, and foods such as margarine.
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 March 25, 1992 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.