Self-inverting water-in-oil emulsions of water- soluble polymers
CA 1207478 A · Owner: The Dow Chemical Company · Inventors: Adaway, Timothy J.; Fravel, Harold G. Jr.; Easterly, James P. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a self-inverting stable water-in-oil emulsion and to a process for preparing such an emulsion. The emulsion comprises (1) a discontinuous aqueous phase containing a watersoluble polymer which discontinuous phase is dispersed into a continuous oil phase wherein the emulsion contains an inverting amount of an inverting surfactant and an emulsifying amount of a water-in-oil emulsifier. The invention is characterized in that the emulsion is prepared by polymerizing a water-in-oil emulsion of a water-soluble monomer containing a portion of the inverting surfactant and adding an additional amount of an inverting surfactant to the resultant water-in-oil emulsion of the …
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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 July 8, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 2003.
- 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.