Patents by Inventor E. Clay Kellam

E. Clay Kellam 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).

  • Polyphosphazenes as gel polymer electrolytes
    Patent number: 6605237
    Abstract: Co-subsituted linear polyphosphazene polymers that useful in gel polymer electrolytes having an ion conductivity at room temperature of at least about 10−5 S/cm and comprising (i) a polyphosphazene having controlled ratios of side chains that promote ionic conductivity and hydrophobic, non-conductive side chains that promote mechanical stability, (ii) a small molecule additive, such as propylene carbonate, that influences the ionic conductivity and physical properties of the gel polymer electrolytes, and (iii) a metal salt, such as lithium trifluoromethanesulfonate, that influences the ionic conductivity of the gel polymer electrolytes, and methods of preparing the polyphosphazene polymers and the gel polymer electrolytes are disclosed.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: August 12, 2003
    Assignee: The Penn State Research Foundation
    Inventors: Harry R. Allcock, E. Clay Kellam, III, Robert V. Morford
  • Polyphosphazenes as gel polymer electrolytes
    Publication number: 20020014616
    Abstract: Co-subsituted linear polyphosphazene polymers that useful in gel polymer electrolytes having an ion conductivity at room temperature of at least about 10−5S/cm and comprising (i) a polyphosphazene having controlled ratios of side chains that promote ionic conductivity and hydrophobic, non-conductive side chains that promote mechanical stability, (ii) a small molecule additive, such as propylene carbonate, that influences the ionic conductivity and physical properties of the gel polymer electrolytes, and (iii) a metal salt, such as lithium trifluoromethanesulfonate, that influences the ionic conductivity of the gel polymer electrolytes, and methods of preparing the polyphosphazene polymers and the gel polymer electrolytes are disclosed.
    Type: Application
    Filed: June 28, 2001
    Publication date: February 7, 2002
    Inventors: Harry R. Allcock, E. Clay Kellam, Robert V. Morford