Patents by Inventor Johann Katz Leroux

Johann Katz Leroux 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).

  • Gas separation using membranes formed from blends of perfluorinated polymers
    Patent number: 6723152
    Abstract: A preferred gas separation membrane made from a blend of a copolymer of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (BDD) and tetrafluoroethylene (TFE) with a 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxide based polymer is disclosed, the membrane exhibiting an advantageous combination of gas separation and permeation properties for a number of gas separation applications. In particular, the membrane formed from the blend of these polymers exhibits unexpectedly high gas separation factors for separation of volatile organic hydrocarbon vapors (VOC) from air, compared to the component polymers that form the blends. Fabrication of composite membranes formed from perfluoropolymer blends is further disclosed.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: April 20, 2004
    Assignee: Praxair Technology, Inc.
    Inventors: Benjamin Bikson, Yong Ding, Johann Katz Leroux, Joyce Katz Nelson
  • Gas separation using membranes formed from blends of perfluorinated polymers
    Publication number: 20040003714
    Abstract: A preferred gas separation membrane made from a blend of a copolymer of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (BDD) and tetrafluoroethylene (TFE) with a 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxide based polymer is disclosed, the membrane exhibiting an advantageous combination of gas separation and permeation properties for a number of gas separation applications. In particular, the membrane formed from the blend of these polymers exhibits unexpectedly high gas separation factors for separation of volatile organic hydrocarbon vapors (VOC) from air, compared to the component polymers that form the blends. Fabrication of composite membranes formed from perfluoropolymer blends is further disclosed.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 8, 2004
    Inventors: Benjamin Bikson, Yong Ding, Johann Katz Leroux, Joyce Katz Nelson