Patents Examined by Joseph L. Schoton
  • Polymerization process
    Patent number: 5789508
    Abstract: A compound of the formula C.sub.6 F.sub.12 --CH.sub.2 CH.sub.2 --SO.sub.3 M, wherein M is a cation having a valence of 1 is used as a dispersing agent in the aqueous dispersion polymerization of tetrafluoroethylene with at least one other perfluorinated copolymerizable monomer.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: August 4, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Bruce Edward Baker, Roger John Zipfel