Patents by Inventor M. Keith Murphy

M. Keith Murphy 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).

  • Polymers, polymer membranes and methods of producing the same
    Patent number: 8926733
    Abstract: A method for preparing a polymeric material includes: providing a polymeric matrix having at least one polymer and at least one porogen; and degrading the at least one porogen at a temperature T?1.1 Tg, where Tg is a glass transition temperature of the polymeric matrix. The degrading step includes exposing the polymeric matrix to thermal degradation, chemical degradation, electrical degradation and/or radiation degradation, wherein the polymeric material has a permeability at least 1.2 times a permeability of the polymeric matrix for a gas, and a selectivity of the polymeric material is at least 0.35 times a selectivity of the polymeric matrix for a gas pair. The method preferably provides gas separation membranes that exceed Robeson's upper bound relationship for at least one gas separation pair. Novel polymeric materials, gas separation membranes and fluid component separation methods are also described.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: January 6, 2015
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shiying Zheng, Lloyd M. Robeson, M. Keith Murphy, Jeffrey R. Quay
  • POLYMERS, POLYMER MEMBRANES AND METHODS OF PRODUCING THE SAME
    Publication number: 20130047844
    Abstract: A method for preparing a polymeric material includes: providing a polymeric matrix having at least one polymer and at least one porogen; and degrading the at least one porogen at a temperature T?1.1 Tg, where Tg is a glass transition temperature of the polymeric matrix. The degrading step includes exposing the polymeric matrix to thermal degradation, chemical degradation, electrical degradation and/or radiation degradation, wherein the polymeric material has a permeability at least 1.2 times a permeability of the polymeric matrix for a gas, and a selectivity of the polymeric material is at least 0.35 times a selectivity of the polymeric matrix for a gas pair. The method preferably provides gas separation membranes that exceed Robeson's upper bound relationship for at least one gas separation pair. Novel polymeric materials, gas separation membranes and fluid component separation methods are also described.
    Type: Application
    Filed: May 13, 2010
    Publication date: February 28, 2013
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Shiying Zheng, Lloyd M. Robeson, M. Keith Murphy, Jeffrey R. Quay