Polysulfone ionomers
CA 1237231 A · Owner: National Research Council Of Canada · Inventors: Kutowy, Oleh; Apsimon, John W.; Guiver, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Polysulfone Ionomers, INVENTORS Michael D. Guiver, Oleh Kutowy, John W. ApSimon Abstract of the Disclosure, Aromatic ionomeric copolymers having arylether and arylsulfone linkages have been prepared by condensation of both:, (a) The alkali metal bisphenate salts of 9, 9-bis ( 4-hydroxyphenyl)-fluoren-4-carboxylic acid, optionally with another bisphenol in a proportion of 0-99 mol percent based on the combined bisphenates in the mixture;, and (b) dihalodiphenylsulfones where the halogen is selected from chlorine or fluorine. The copolymers are useful as ion exchange materials and permselective membranes among other things. A process of preparing and purifying the carboxylic acid …
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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
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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.