Patents by Inventor Anthony J. Simpson

Anthony J. Simpson 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 bleach activators
    Patent number: 5523434
    Abstract: The synthesis of phenol sulfonate esters of alkanoyl amino acids is conducted in the presence of aqueous base to provide bleach activator compounds. Thus, the acid chloride of N-nonanoyl-6-aminocaproic acid is reacted with the sodium salt of p-phenol sulfonate in the presence of water at a pH in the range of about 9 to about 12 to yield the corresponding phenol sulfonate ester. The synthesis of the phenol sulfonate ester of the monononyl amide of adipic acid is also illustrated.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: June 4, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Michael E. Burns, Anthony J. Simpson