Patents by Inventor Mark S. Sowell, III

Mark S. Sowell, III 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).

  • Production and separation of amines
    Patent number: 4491673
    Abstract: This invention provides for the separation of the contents of the process discharge stream of reaction in which an amine is produced from a nitrile. An inorganic base having a concentration greater than 40 weight percent is introduced into the process discharge stream which is decanted, purged, flashed, and a portion thereof recycled.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: January 1, 1985
    Assignee: Monsanto Company
    Inventors: Charles E. Cutchens, Marion J. Mathews, III, Mark S. Sowell, III
  • Production and separation of amines
    Patent number: 4395573
    Abstract: In the production of hexamethylenediamine from adiponitrile an inorganic base is used to facilitate separation of Raney nickel catalyst and crude hexamethylenediamine.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: July 26, 1983
    Assignee: Monsanto Company
    Inventors: Charles E. Cutchens, Marion J. Mathews, III, Mark S. Sowell, III