Patents by Inventor Donald Walter Welsh Kirkwood

Donald Walter Welsh Kirkwood 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).

  • Oxygen enrichment process for air based gas phase oxidations which use metal oxide redox catalysts
    Patent number: 6613949
    Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: September 2, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Matthew Lincoln Wagner, Donald Walter Welsh Kirkwood, Kazuo Kiyonaga
  • Oxygen enrichment process for air based gas phase oxidations which use metal oxide redox catalysts
    Patent number: 5646305
    Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: July 8, 1997
    Assignee: Praxair Technology, Inc.
    Inventors: Matthew Lincoln Wagner, Donald Walter Welsh Kirkwood, Kazuo Kiyonaga