Synthetic polyether thickeners and thickened aqueous systems containing them
CA 1265889 C · Owner: Deck, Charles Francis · Inventors: Deck, Charles Francis; Owens, James Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention relates to synthetic polyether thickeners and thickened aqueous systems containing them. The thickeners are unique because they can be used in aqueous systems at less than ten percent weight concentration which will flow in a Vickers 104(C) Vane pump at use temperatures. These properties make them particularly useful for thickening hydraulic fluids used in high pressure vane and gear pumps. The thickeners are prepared by reacting conventional polyether polyols with alpha-olefin epoxides having an average of 6 to 12 total carbon atoms to obtain products with specific epoxide-to-hydroxyl ratios.
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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 February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.