Patents by Inventor Howard P. Stephens

Howard P. Stephens 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).

  • Thin film hydrous metal oxide catalysts
    Patent number: 5461022
    Abstract: Thin film (<100 nm) hydrous metal oxide catalysts are prepared by 1) synthesis of a hydrous metal oxide, 2) deposition of the hydrous metal oxide upon an inert support surface, 3) ion exchange with catalytically active metals, and 4) activating the hydrous metal oxide catalysts.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: October 24, 1995
    Assignee: Sandia Corporation
    Inventors: Robert G. Dosch, Howard P. Stephens
  • Hydrous oxide ion-exchange compound catalysts
    Patent number: 4929582
    Abstract: A catalytic material of improved activity which comprises a hydrous, alkali metal or alkaline earth metal or quaternary ammonium titanate, zirconate, niobate, or tantalate, in which the metal or ammonium cations have been exchange with a catalytically effective quantity of a catalyst metal, and which has been subsequently treated with a solution of a Bronsted acid.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: May 29, 1990
    Assignee: The United States of American as Represented by The United States Department of Energy
    Inventors: Robert G. Dosch, Howard P. Stephens
  • Catalysis using hydrous metal oxide ion exchanges
    Patent number: 4511455
    Abstract: In a process which is catalyzed by a catalyst comprising an active metal on a carrier, said metal being active as a catalyst for the process, an improvement is provided wherein the catalyst is a hydrous, alkali metal or alkaline earth metal titanate, zirconate, niobate or tantalate wherein alkali or alkaline earth metal cations have been exchanged with a catalytically effective amount of cations of said metal.
    Type: Grant
    Filed: April 10, 1984
    Date of Patent: April 16, 1985
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert G. Dosch, Howard P. Stephens, Frances V. Stohl