Stable anhydrous compositions for topical delivery of active materials
CA 2014633 C · Owner: Curtis, Helene Inc. · Inventors: Mccrea, Andrew D.; Diulus, Michael P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anhydrous, topically-effective, composition that resists phase separation and exhibits improved sensory properties comprising a topically-active compound, such as an astringent salt; a finely-divided silica; a suspending wax composition; and a suitable volatile liquid carrier vehicle, such as a volatile silicone or a volatile hydrocarbon. The anhydrous, topically-effective composition is useful in topical cosmetic and medicinal preparations, such as antiperspirants sunscreens and topical drug products, and is especially useful in cosmetic and medicinal preparations wherein an insoluble topically-active compound is dispersed throughout a liquid phase.
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 April 17, 1990 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.