Patents by Inventor Wayne A. Langdale

Wayne A. Langdale 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).

  • Preparation of porphyrins and their metal complexes
    Patent number: 5659029
    Abstract: A hydroxyl-containing pyrrolic compound having a hydroxyl group or a hydroxyl-containing group in the 2-position, optionally substituted in the beta positions, is condensed in an acidified two immiscible phase solvent system to produce excellent yields of the corresponding porphyrin or metal porphyrin.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: August 19, 1997
    Assignee: Sun Company, Inc. (R&M)
    Inventors: Paul E. Ellis, Jr., Wayne A. Langdale
  • Method of preparing heteropolyacid catalysts
    Patent number: 4916101
    Abstract: Polyoxoanions are converted to the corresponding heteropolyacids by conversion to their tetrabutylammonium salt followed by pyrolysis.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: April 10, 1990
    Assignee: Sun Refining and Marketing Company
    Inventors: James E. Lyons, Paul E. Ellis, Jr., Wayne A. Langdale, Harry K. Myers, Jr.
  • Oxidation of alkanes
    Patent number: 4859798
    Abstract: Alkanes are oxidized in the liquid phase at relatively low temperatures using heteropolyacids or polyoxoanions promoted with azide or certain metals. Such azide catalysts are also part of the invention.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: August 22, 1989
    Assignee: Sun Refining and Marketing Company
    Inventors: James E. Lyons, Paul E. Ellis, Jr., Harry K. Myers, Jr., George Suld, Wayne A. Langdale
  • Alkane oxidation catalysts
    Patent number: 4803187
    Abstract: Heteropolyacids or polyoxoanions promoted with azide, such as K.sub.6 PW.sub.11 VO.sub.40 N.sub.3, useful in the liquid phase oxidation of alkanes.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 7, 1989
    Assignee: Sun Refining and Marketing Company
    Inventors: James E. Lyons, Paul E. Ellis, Jr., Harry K. Myers, Jr., George Suld, Wayne A. Langdale