Patents by Inventor Ronald D. Stewart

Ronald 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
  • Flotation assembly with monitoring device
    Patent number: 7854639
    Abstract: A flotation assembly preferably, but not necessarily, of the type installed beneath the seat of a commercial airline and comprising a base structured and configured to define a life vest of the type intended to support an individual in a body of water. A monitoring device preferably comprises a radio frequency identification device or RFID tag, structured for wireless communication, is connected to the life vest in a predetermined location which generally restricts physical access thereto, but does not interfere with wireless communication therewith. As such, an appropriate reader assembly may be brought into the general vicinity of the RFID tags associated with a plurality of the life vests, thereby facilitating the efficient inspection of each of the life vests.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: December 21, 2010
    Inventors: Eloy Leal, Ronald D. Stewart
  • Method for shredding material
    Patent number: 5535946
    Abstract: The present invention discloses a method for safely and easily shredding a variety of material particularly material having a low melt temperature and/or containing material sensitive to high static electric charges, such as 1.1 and 1.3 class material. The method comprises applying a cloud of gas vapor onto the shredding means to cool the shredding means to a temperature below that of the melt temperature of the material being shredded and to also reduce the static electric charge on the resulting particles of material which may develop during the shredding process. Further described is an apparatus for carrying out the method.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: July 16, 1996
    Assignee: United Technologies Corporation
    Inventors: Ross P. Clark, Ronald D. Stewart
  • Vector network analyzer with integral processor
    Patent number: 4641085
    Abstract: A precision vector network analyzer which is suitable for a wide range of applications including both laboratory and automated production measurements and testing is disclosed. New measurement capabilities, greater ease of use, and nearly complete automation are provided. Contributions include fully coordinated communications between subsystem modules; real time, two channel, precision vector measurements with complete, internal error correction; wide frequency capability from RF to millimeter bands; combined time and frequency domain analysis and display; measurements either in the swept or step frequency modes; and user definable test functions and calibration device sets.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: February 3, 1987
    Assignee: Hewlett-Packard Company
    Inventors: S. Bruce Donecker, Ronald D. Stewart, Wayne L. Frederick