Patents by Inventor Ralph D. Stewart

Ralph D. Stewart 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
  • Bedding mattress spring assembly having border edge support
    Patent number: 5062172
    Abstract: A bedding mattress spring assembly comprising rows of coil springs laced together by helical lacing wires and having border wires secured around the periphery of the assembly in the top and bottom planes of the assembly. The border wires are secured to the edgemost coil springs by sheet metal clips. Extending between the border wires are edge support springs which are secured to the border wires by U-shaped channels formed in the ends of the edge support springs.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: November 5, 1991
    Assignee: Leggett & Platt, Incorporated
    Inventor: Ralph D. Stewart
  • Recessed last and method of lasting and molding a shoe sole to upper including positioning insole in recessed last
    Patent number: 3983204
    Abstract: A recessed last, and a method of using same in lasting an upper and insole and molding a sole thereto, including inserting an insole in the recess of the last and retaining the insole in position during molding by the edges of the lasted upper.The foregoing abstract is not to be taken either as a complete exposition or as a limitation of the present invention, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be had to the following detailed description and the accompanying drawings as well as to the claims.
    Type: Grant
    Filed: July 14, 1971
    Date of Patent: September 28, 1976
    Assignee: Uniroyal, Inc.
    Inventors: Jerome L. Opinsky, Ralph D. Stewart