Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 23, 2021
Patent Application Number
16569983
Date Filed
September 13, 2019
Patent Citations Received
Patent Primary Examiner
Patent abstract
A novel process for making PBI films starting from gel PBI membranes polymerized and casted in the PPA process wherein acid-imbibed gel PBIs are neutralized in a series of water baths and undergo controlled drying in association with a substrate material, yielding a PBI film without the use of organic solvents.
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