Cosmetic composition
CA 2031285 A1 · Owner: Unilever Plc · Inventors: Pereira, Mavis C.; Thom, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A watar-in-silicone oil emulsion suitable for topical, application to mammalian skin or hair comprises, in, addition to water, a volatile polydimethylsiloxane a, silicone surfactant ingredient comprising a polymer of dimethylpolysiloxane with polyoxyethylene and/or polyoxypropylene side chains having a molecular weight of from 10,000 to 50,000, an inorganic electrolyte and preferably a 2-hydroxyalkanoic acid or derivative thereof, and an alkane diol.
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 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.