Stable membranes from sulfonated polyarylethers
CA 1332325 C · Owner: Testa, Anthony Joseph · Inventors: Vouros, James George; Testa, Anthony Joseph; Tomaschke, John Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
i-, PATENT APPLICATION OF, John Tomaschke San Diego, CA, Anthony Joseph Testa, Westwood MA, James George Vouros, Boston, MA, for STABLE MEMBRANES FROM SULFONATED POLYARYLETHERS Abstract of the Disclosure, The invention provides a novel thin film composite or coated membrane suitable for reverse osmosis ultrafil-, tration and microfiltration applications and having a, porous polymeric substrate with one or more microporous layers to which a thin film or coating comprising a sulfonated polyarylether is attached substantively to provide an oxidatively stable, thin hydrophilic film or coating layer, and a method for manufacturing and using the same.
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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
- 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.