Patents by Inventor Stephen M. Winder

Stephen M. Winder 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).

  • Fusion-cast refractory with high electrical resistivity
    Patent number: 7598195
    Abstract: A fusion-cast refractory is provided. The refractory comprises 0.8% to 2.5% Al2O3, 4.0% to 10.0% SiO2, 86% to 95% ZrO2, 0.1% to 1.2% B2O3, up to 0.04% Na2O, up to 0.4% CaO, up to 0.1% Fe2O3 and up to 0.25% TiO2.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: October 6, 2009
    Assignee: Refractory Intellectual Property GmbH & Co. KG
    Inventors: Amul Gupta, Stephen M. Winder
  • Sintering process and novel ceramic material
    Patent number: 5139719
    Abstract: A process for the sintering of a body comprising silicon carbide and a boron-containing material, which comprises heating the body to an effective sintering temperature in the presence of nitrogen; removing the nitrogen by evacuation to a pressure of less than 10.sup.-2 mbar; and continuing the sintering under vacuum or in the presence of an inert gas other than nitrogen. The invention also describes a sintered body comprising silicon carbide and a boron-containing material, having a density of at least 96% of its theoretical maximum density, in which the body contains less than 0.7% w of free carbon, and has a mean silicon carbide grain size of less than 5 microns.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: August 18, 1992
    Assignee: The British Petroleum Company p.l.c.
    Inventor: Stephen M Winder