Patents by Inventor Ralph F. Fox

Ralph F. Fox 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).

  • Abrasive article including shaped abrasive particles comprising a particular toothed body
    Patent number: 11932802
    Abstract: Various shaped abrasive particles are disclosed. Each shaped abrasive particle includes a body having at least one major surface and a side surface extending from the major surface.
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: March 19, 2024
    Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.
    Inventors: Todd M. Cotter, Francois Wagner, Rene G. Demers, Richard J. Klok, Alexandra Marazano, Adam D. Lior, James A. Salvatore, Sujatha K. Iyengar, David F Louapre, Sidath S. Wijesooriya, Ronald Christopher Motta, Gary A. Guertin, Michael D. Kavanaugh, Doruk O. Yener, Jennifer H. Czerepinski, Jun Jia, Frederic Josseaux, Ralph Bauer, Frank J. Csillag, Yang Zhong, James P. Stewart, Mark P. Dombrowski, Sandhya Jayaraman Rukmani, Amandine Martin, Stephen E. Fox, Nilanjan Sarangi, Dean S. Matsumoto
  • Electrophotographic photoconductor contains ordered copolyester polycarbonate binder
    Patent number: 5130215
    Abstract: A layered electrophotographic photoconductor is disclosed having a ground plane layer, a charge generating layer carried by the ground plane layer, and a charge transport layer carried by the charge generating layer. The polymeric binder material of the charge transport layer and the charge generation layer comprises an ordered copolyestercarbonate whose ester content is in the range of about 35 wt. % to about 70 wt. %, of which about 60 wt. % to about 70 wt. % is preferred, and of which about 70 wt. % is the most preferred. The charge generating molecule is a squarylium, and more specifically 2,4-bis-(4-dimethylamino-2-hydroxyphenyl) cyclobutene diylium-1,3-diolate (OHSQ), or an operative phthalocyanine compound, and preferably oxytitanium phthalocyanine. The charge transporting molecule is a hydrazone, and more specifically 4-diethylaminobenzaldehyde-1,1-diphenylhydrazone (DEH), or 4-diphenylaminobenzaldehyde-1,1-diphenylhydrazone (TPH).
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: July 14, 1992
    Assignee: Lexmark International, Inc.
    Inventors: James M. Adley, Vernon M. Balthis, Dean S. Ehn, Ralph F. Fox, Jacob Pacansky, Robert L. Vollmer, Robert J. Waltman