Patents by Inventor Robert M. Warren

Robert M. Warren 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).

  • Water washable lithographic newspaper printing ink
    Patent number: 6444021
    Abstract: A water washable lithographic newspaper ink comprising: a modified soybean oil based resin; pigment; an acid neutralizing agent; and a humectant. In addition, the ink according to the present invention may also comprise water, and a rewetting agent, preferably hydroxyethyl ethylene urea.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: September 3, 2002
    Assignee: Sun Chemical Corporation
    Inventors: Carl S. Weisbecker, John H. Krech, Richard R. Durand, Jr., Michelle J. Webb, Robert M. Warren