Encapsulated materials
CA 2105089 C · Owner: El-Nokaly, Magda · Inventors: El-Nokaly, Magda
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to polymeric liquid crystals prepared from a polysaccharide and a solvent preferably water, which, are used to deliver nutrients perfumes, flavors, drugs and other ingredients in foods cosmetics, household soaps, health care products e.g. bar or liquid soaps, toothpaste shampoos, creams, and lotions and other preparations. The encapsulated active vehicle comprises: (a) from about 0.001 % to about 60 % of an active; and (b) from about 40 % to about 99.999 % of a stable polymeric liquid crystal consisting essentially of: (1) from about 10 % to about 90 % of a solvent; and (2) from about 10 % to about 90 % of a polysaccaride having a molecular weight of from about 500 to …
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 5, 1992 and granted August 5, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.