Patents by Inventor Geoffrey Andrew Russell

Geoffrey Andrew Russell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for making polyarylethers and use in membrane preparation
    Patent number: 9353220
    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.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: May 31, 2016
    Assignee: Fresenius Medical Care Holdings, Inc.
    Inventors: Selvaraj Savariar, Kevin Hudson, Geoffrey Andrew Russell, James Leslie White, Brett Allen Barton, Cheryl Ford, Jiunn Teo
  • Process For Making Polyarylethers And Use In Membrane Preparation
    Publication number: 20150048533
    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.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Fresenius Medical Care Holdings, Inc
    Inventors: Selvaraj Savariar, Kevin Hudson, Geoffrey Andrew Russell, James Leslie White, Brett Allen Barton