Patents by Inventor Donald G. Gray

Donald G. Gray 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).

  • Multilayer structure including an active electrochemical material and ionic polymer in a electrochemical cell
    Patent number: 6986967
    Abstract: Multilayer articles, particularly multilayer articles having electrical or ionic conductivity, are made using an improved melt extrusion process. The process includes a combination step in which a macroscopically homogeneous mass is formed prior to introduction into an extruder. The multilayer article may include an electrode layer and a separator layer that are extruded onto a metal current collector. Such structures are particularly useful in lithium-ion batteries.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: January 17, 2006
    Assignee: E. I. du Pont de Nemours and Company, Inc.
    Inventors: Kelly D. Barton, Donald G. Gray, Guy E. Rockwell
  • Process for forming multilayer articles by melt extrusion
    Publication number: 20030054245
    Abstract: Multilayer articles, particularly multilayer articles having electrical or ionic conductivity, are made using an improved melt extrusion process. The process includes a combination step in which a macroscopically homogeneous mass is formed prior to introduction into an extruder. The multilayer article may include an electrode layer and a separator layer that are extruded onto a metal current collector. Such structures are particularly useful in lithium-ion batteries.
    Type: Application
    Filed: October 30, 2002
    Publication date: March 20, 2003
    Inventors: Kelly D. Barton, Donald G. Gray, Guy E. Rockwell
  • Process for forming multilayer articles by melt extrusion
    Patent number: 6503432
    Abstract: Multilayer articles, particularly multilayer articles having electrical or ionic conductivity, are made using an improved melt extrusion process. The process includes a combination step in which a macroscopically homogeneous mass is formed prior to introduction into an extruder. The multilayer article may include an electrode layer and a separator layer that are extruded onto a metal current collector. Such structures are particularly useful in lithium-ion batteries.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: January 7, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kelly D. Barton, Donald G. Gray, Guy E. Rockwell