Patents by Inventor Robert Edward Lutz

Robert Edward Lutz 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).

  • Cross-linked polyester toners and process of making such toners
    Patent number: 6359105
    Abstract: Cross-linked toner resin having linear portions and cross-linked portions of high density microgel particles, where the toner resin is an unsaturated polyester resin, is prepared using a liquid chemical initiator such as 1,1-bis(t-butyl peroxy)-3,3,5-trimethylcyclohexane so that the cross-linked resin achieved contains less than 0.20 percent by weight of acids. In particular, the cross-linked toner resin is free of benzoic acid. The method of making the cross-linked toner resin includes (a) spraying the liquid chemical initiator onto the unsaturated polyester resin prior to, during or subsequent to melting of the unsaturated polyester resin to form a polymer melt; and (b) subsequently cross-linking the polymer melt under high shear to form the cross-linked toner resin.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: March 19, 2002
    Assignee: Xerox Corporation
    Inventors: John James Ianni, J. Stephen Kittelberger, Daniel Andrew Harrington, Eugene Frederick Young, Hui Chang, Nilmarie Santos-Roman, Dennis J. O'Keefe, Joseph Louis Leonardo, Paul Lynn Jacobs, Kiran B. Sheth, Dongming Li, Louis Joseph Kurtic, Jr., Robert Edward Lutz, Yelena Lipovetskaya