Patents by Inventor George Francis Diffendall

George Francis Diffendall 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).

  • Hydrogenation of polytrimethylene ether glycol
    Patent number: 7342142
    Abstract: A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: March 11, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Mayis Seapan, George Francis Diffendall, Francis Glenn Gallagher
  • Process for preparing peroxides
    Patent number: 5962746
    Abstract: A process for the faster manufacturing of hydrocarbon, fluorocarbon and chlorocarbon acyl peroxides is disclosed wherein a hydroxide, a peroxide and an acyl halide are reacted under continuous vigorous agitation conditions so as to bring the reaction to substantial completion is less than one minute.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: October 5, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: George Francis Diffendall, Thomas William Harding, Joseph Norman Hockman, Carl George Krespan, Matthew John Targett, Robert Clayton Wheland