Patents by Inventor William C. Tettenhorst

William C. Tettenhorst 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).

  • Synthesis of amido acids from carboxylic acids and lactams
    Patent number: 5534642
    Abstract: Chemical synthesis of amido acids, and their conversion to amido acid phenyl ester sulfates for use as bleach activators, starting from carboxylic acids and lactams.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: July 9, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Jeffrey S. Dupont, William C. Tettenhorst
  • Synthesis of amido acids from carboxylic acids and lactams
    Patent number: 5414099
    Abstract: Chemical synthesis of amido acids, and their conversion to amido acid phenyl ester sulfates for use as bleach activators, starting from carboxylic acids and lactams.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: May 9, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Jeffrey S. Dupont, William C. Tettenhorst