Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 5, 2008
Patent Application Number
10481517
Date Filed
June 26, 2002
Patent Citations Received
Patent Primary Examiner
Patent abstract
Membranes comprising an aromatic ether ketone polymer (e.g. polyetherketone) in sheet or hollow fibre form are made by preparing at least a 12 wt % solution of the polymer in a solvent which is chemically inert to the polymer (e.g. concentrated sulphuric acid); forming a film of the solution in sheet or hollow form; and contacting the film with a non-solvent (e.g. more dilute sulphuric acid or acetic acid) thereby to precipitate the film.
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