The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2016
Filed:
Aug. 13, 2013
Fresenius Medical Care Holdings, Inc., Waltham, MA (US);
Selvaraj Savariar, Waltham, MA (US);
Kevin Hudson, North Ogden, UT (US);
Geoffrey Andrew Russell, Ogden, UT (US);
James Leslie White, Ogden, UT (US);
Brett Allen Barton, West Haven, UT (US);
Cheryl Ford, Ogden, UT (US);
Jiunn Teo, Pleasant View, UT (US);
Fresenius Medical Care Holdings, Inc., Waltham, MA (US);
Abstract
A process for making polyarylethers provides a reaction mixture that includes a dipolar aprotic solvent for polyarylether and polyarylether forming reactants, and reacts the polyarylether-forming reactants, with removing of water with nitrogen in the absence of azeotrope forming cosolvent and optionally replacing removed amounts with dipolar aprotic solvent. The process can further include directly wet spinning the reactor solution without recovery of the polymer from the dipolar aprotic solvent through a spinneret to form hollow fibers or flat sheets suitable for membranes.