Absorbent polymer and surfactant as antiperspirant
CA 1109799 A · Owner: Unilever Limited · Inventors: Stebles, Malcolm R.D.; Chaudhuri, Dwaipayan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antiperspirant composition for topical application to human skin comprises a moisture-absorbent water-insoluble polymer which is substantially dry to the touch when swollen with water, a surfactant having a melting point of from 30 to 75°C.and an organic solvent in which the polymer is substantially insoluble. The polymer has a water absorption value of at least 2 preferably 5 to 500. Preferred polymers are derived from anionic polyelectrolytes. The antiperspirant composition can be packaged in a dispenser or other container such as a propellant pressurised aerosol device, a finger-operated pump spray device or a roll-ball applicator.
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
- Granted September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
- 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.