Patents by Inventor Kohai Hase

Kohai Hase 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).

  • Electrolytes for fuel cell electrodes
    Patent number: 7943675
    Abstract: Improved polymer-based materials are described, for example for use as an electrode binder in a fuel cell. A fuel cell according to an example of the present invention comprises a first electrode including a catalyst and an electrode binder, a second electrode, and an electrolyte located between the first electrode and the second electrode. The electrolyte may be a proton-exchange membrane (PEM). The electrode binder includes one or more polymers, such as a polyphosphazene.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: May 17, 2011
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Case Western Reserve University, Toyota Motor Corporation
    Inventors: John Muldoon, Ryszard J. Wycisk, Jun Lin, Peter N. Pintauro, Kohai Hase
  • Heterocycle grafted monomers and related polymers and hybrid inorganic-organic polymer membranes
    Patent number: 7576165
    Abstract: Polymers, polymer precursors, and other materials are described, having at least one heterocycle and being useful for fabrication of proton-exchange membranes (PEMs). In representative examples, the heterocycle is a fluorinated imidazole ring. The heterocycle can be chosen to have a low value of pKa, and may be a triazole ring, other nitrogen-containing heterocycle, or derivative thereof. Polymers and composites were prepared having excellent proton conductivity. Applications of these materials include fuel cells and other ion-conducting applications.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: August 18, 2009
    Assignees: Georgia Institute of Technology, Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Siwen Li, Zhen Zhou, Meilin Liu, Wen Li, Kohai Hase
  • Heterocycle grafted monomers and related polymers and hybrid inorganic-organic polymer membranes
    Publication number: 20060111530
    Abstract: Polymers, polymer precursors, and other materials are described, having at least one heterocycle and being useful for fabrication of proton-exchange membranes (PEMs). In representative examples, the heterocycle is a fluorinated imidazole ring. The heterocycle can be chosen to have a low value of pKa, and may be a triazole ring, other nitrogen-containing heterocycle, or derivative thereof. Polymers and composites were prepared having excellent proton conductivity. Applications of these materials include fuel cells and other ion-conducting applications.
    Type: Application
    Filed: January 26, 2005
    Publication date: May 25, 2006
    Inventors: Siwen Li, Zhen Zhou, Meilin Liu, Wen Li, Kohai Hase