Patents by Inventor Mark Meredith Trayner

Mark Meredith Trayner 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).

  • Extended wear developer sleeve with coupling agent
    Patent number: 5942287
    Abstract: An extended wear developer sleeve coating formulation that provides optimum print quality for a toner cartridge that prints 30,000 pages. The coating formulation contains an unique coupling agent which acts to chemically bond the graphite material and the phenolic resin components of the formulation together, even at high graphite loads, to increase the cohesive strength of the coating and improve its wear resistance.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 24, 1999
    Assignee: Lexmark International, Inc.
    Inventors: Robert Arnold Christiansen, Martin Victor Digirolamo, Michelle Kathryn Morris, Mark Meredith Trayner