Patents by Inventor Donald Frederick Lyons

Donald Frederick Lyons 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).

  • Process for producing fluoroelastomers with fluorinated anionic surfactants
    Patent number: 6774164
    Abstract: A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF2CF2)n—CH2CH2SO3M, where n is an integer from 2 to 9, or mixtures thereof, and M is a cation having a valence of 1, is used as the dispersing agent.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: August 10, 2004
    Assignee: DuPont Dow Elastomers L.L.C.
    Inventors: Donald Frederick Lyons, Albert Lloyd Moore, Phan Linh Tang
  • Peroxide curable fluoroelastomers
    Publication number: 20040092684
    Abstract: Peroxide curable fluoroelastomers having copolymerized units of vinylidene fluoride or tetrafluoroethylene major monomer, at least one other fluorinated major monomer, a cure site monomer having the general formula CH2═CH—(CF2)nI, where n is an integer between 2 and 8, and iodine bound at the terminal positions of polymer chains, process well and have excellent tensile properties.
    Type: Application
    Filed: September 25, 2003
    Publication date: May 13, 2004
    Inventor: Donald Frederick Lyons
  • Peroxide curable fluoroelastomers
    Patent number: 6646077
    Abstract: Peroxide curable fluoroelastomers having copolymerized units of vinylidene fluoride or tetrafluoroethylene major monomer, at least one other fluorinated major monomer, a cure site monomer having the general formula CH2═CH—(CF2)nI, where n is an integer between 2 and 8, and iodine bound at the terminal positions of polymer chains, process well and have excellent tensile properties.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: November 11, 2003
    Assignee: DuPont Dow Elastomers LLC
    Inventor: Donald Frederick Lyons
  • Inhibitor composition for chloroprene polymerization
    Patent number: 6566467
    Abstract: Polymerization inhibitor compositions for the emulsion polymerization of chloroprene comprise a 4-(lower alkoxy)phenol and a hindered bis(phenol)methane in a molar ratio in the range of 0.5/1-2.5/1. Discoloration resistant polychloroprene rubbers are produced.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: May 20, 2003
    Inventor: Donald Frederick Lyons