Patents by Inventor Paul Douglas Brothers

Paul Douglas Brothers 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).

  • Polymerization of fluoromonomers in carbon dioxide
    Patent number: 6103844
    Abstract: Polymerization of vinylidene fluoride in carbon dioxide media is effectively initiated by dialkyl(2,2-azobisisobutyrate). Methyl is a preferred alkyl.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: August 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Paul Douglas Brothers
  • Polymerization of fluoropolymers in carbon dioxide
    Patent number: 6051682
    Abstract: Fluoromonomer is polymerized to obtain a fluoropolymer with the polymerization being carried out in a pressurized polymerization reactor containing a polymerization medium comprising liquid or supercritical CO.sub.2. The polymerization medium is withdrawn from the reactor together with the fluoropolymer and flash decompressed to thereby recover the fluoropolymer from the medium.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: April 18, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: F. Edward Debrabander, Paul Douglas Brothers
  • Phosphorus-containing fluoromonomers and polymers thereof
    Patent number: 5969067
    Abstract: Fluorinated vinyl ethers having phosphorus-containing groups are useful as monomers in making fluoropolymers having functional sites.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: October 19, 1999
    Assignee: E.I. Dupont de Nemours and Company
    Inventors: Paul Douglas Brothers, Ming-Hong Hung, Michael Joseph Michalczyk, Tatsuhiro Takahashi
  • Amorphous fluoropolymer containing perfluoro(ethyl vinyl ether)
    Patent number: 5919878
    Abstract: Amorphous fluoropolymers contain tetrafluoroethylene and perfluoro(ethyl vinyl ether).
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: July 6, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul Douglas Brothers, Richard Alan Morgan
  • Fluorocyanate and fluorocarbamate monomers and polymers thereof
    Patent number: 5866711
    Abstract: Fluorinated vinyl ethers having cyanate or carbamate groups are useful as monomers in making fluoropolymers having functional sites.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: February 2, 1999
    Assignee: E. I. du pont de Nemours and Company
    Inventors: Ming-Hong Hung, Paul Douglas Brothers, Dewey Lynn Kerbow