Patents by Inventor Laurence W. McKeen

Laurence W. McKeen 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).

  • Publication number: 20020017516
    Abstract: The invention provides an electrically heated cooking device having an electrically heated surface for cooking or heating food and a disposable insert of metal foil substrate coated with a nonstick polymer resin. The insert is replaceably affixed to the electrically heated surface so that the nonstick polymer coating on the metal foil substrate is in intimate contact with food being cooked or heated. The invention further provides a method for cooking a meat patty using the cooking device to produce a product with aesthetic appeal and desirable taste in an economic system.
    Type: Application
    Filed: May 9, 2001
    Publication date: February 14, 2002
    Inventors: Laurence W. McKeen, W. Douglas Obal, Richard C. Albert
  • Patent number: 6232372
    Abstract: A composition comprising a plurality of multicomponent particles, one component of each of the particles being melt fabricable fluoropolymer and another component of each of the particles being a high temperature resistant non-dispersed polymer binder. The components of the particles are bound together by mechanical engagement, or alternatively, by chemical interaction. The composition is preferably in the form of a free-flowing powder which is not subject to segregation of component resins during shipping or processing.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: May 15, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul Douglas Brothers, Dewey Lynn Kerbow, Laurence W. McKeen
  • Patent number: 5376307
    Abstract: A coating composition of a perfluorocarbon resin and an electroconductive double shell pigment comprising inner shells of amorphous silica or a silica-containing material and outer shells of antimony-containing tin oxide is useful on a copy roller or belt.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: December 27, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Minori Hagiwara, Kenji Kiwa, Laurence W. McKeen