Patents by Inventor John Lee Howell

John Lee Howell 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).

  • Patent number: 7569527
    Abstract: Substituted aryl pnictogen derivative compositions having the structure of [Rf1-(CtR(u+v))]mE(O)n(CtR1(u+v+1))(3-m) wherein E is phosphorous, arsenic or antimony; Rf1 is a fluoropolyether chain; CtR(u+v) and CtR1(u+v+1) represent aryl groups, n is 0 or 1 and m is greater than about 0.5 to about 3. Such compositions have utility as additives for high temperature lubricants.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: August 4, 2009
    Assignee: E.I. duPont de Nemours and Company
    Inventors: John Lee Howell, Kevin Anthony Hay