Patents by Inventor David L. Olmeijer

David L. Olmeijer 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).

  • Polymer electrolyte having acidic, basic and elastomeric subunits
    Patent number: 7052805
    Abstract: The invention includes compositions comprising at least first and second polymers and optionally a third polymer wherein acid subunits, basic subunits and elastomeric subunits are contained in the polymers. In one aspect, the composition comprises a ternary polymer blend comprising an acidic polymer comprising acidic subunits, a basic polymer comprising basic subunits and an elastomeric polymer comprising elastomeric subunits. In an alternate aspect, the composition comprises a binary polymer blend which comprises acidic or basic subunits in one polymer and a copolymer comprising the other of the acidic or basic subunit and an elastomeric subunit. Such polymer compositions may be formed into a membrane having electrochemical properties which permit the use of such a membrane in an electrochemical device.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: May 30, 2006
    Assignee: SRI International
    Inventors: Subhash Narang, Susanna C. Ventura, David L. Olmeijer
  • Printing of catalyst on the membrane of fuel cells
    Publication number: 20030148159
    Abstract: A method of applying catalytic materials on the membrane of fuel cells using gravure process is provided. In accordance with the method, a catalyst ink comprising catalyst agglomerates with controlled particle size and porosity is formed. The catalyst ink is then applied onto a membrane surface using gravure process to form a catalyst layer having a plurality of three dimensional structural units substantially vertical to the membrane surface.
    Type: Application
    Filed: December 19, 2002
    Publication date: August 7, 2003
    Inventors: Philip Cox, Douglas Diez, Jonathan Servaites, David L. Olmeijer
  • Polymer composition
    Publication number: 20020127454
    Abstract: The invention includes compositions comprising at least first and second polymers and optionally a third polymer wherein acid subunits, basic subunits and elastomeric subunits are contained in the polymers. In one aspect, the composition comprises a ternary polymer blend comprising an acidic polymer comprising acidic subunits, a basic polymer comprising basic subunits and an elastomeric polymer comprising elastomeric subunits. In an alternate aspect, the composition comprises a binary polymer blend which comprises acidic or basic subunits in one polymer and a copolymer comprising the other of the acidic or basic subunit and an elastomeric subunit. Such polymer compositions may be formed into a membrane having electrochemical properties which permit the use of such a membrane in an electrochemical device.
    Type: Application
    Filed: June 1, 2001
    Publication date: September 12, 2002
    Inventors: Subhash Narang, Susanna C. Ventura, David L. Olmeijer