Patents by Inventor Owen W. Webster

Owen W. Webster 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).

  • Anionic polymerization processes
    Patent number: 5563275
    Abstract: Disclosed herein is a process for anionic polymerization of selected methacrylate monomers at elevated (as high as about 100.degree. C.) temperatures, while maintaining good "living" characteristics, by carrying out the polymerization in the presence of a silicon compound and a large cation. Also disclosed is an improved process for the polymerization of vinyl monomers, including methacrylates, which process comprises the use of an anionic intiator which is a combination of an alkali metal hydride and an alkoxysilane or a combination of an alkali metal alkoxide and a silicon hydride.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: October 8, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Frederick P. Gentry, Jr., Owen W. Webster
  • Resins with high surface areas and porosities
    Patent number: 5308877
    Abstract: Organic resins with high surface areas and porosities, which are insoluble in organic solvents and contain few or no flexible groups in the resin structure, are disclosed. Also disclosed is a process for making such resins from polyfunctional aryl alkali metal compounds and a second polyfunctional monomer. Such resins are useful as absorbants.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: May 3, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bruce E. Smart, Owen W. Webster
  • Preparation of 2-(pyridyl)ethyl bis-(trialkyl silyl) phosphonate derivatives
    Patent number: 5290935
    Abstract: A process for producing phosphonate esters containing the 2-(pyridyl)ethyl group by reacting a vinylpyridine with a di- or trihydrocarbylphosphite in the presence of a selected silane, protic acid, or Lewis acid is disclosed. Also disclosed are novel silylphosphonate esters containing the 2-(pyridyl)ethyl group. All of the compounds produced herein are useful as catalysts for increasing the molecular weight of polyamides.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: March 1, 1994
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: David L. Thorn, Owen W. Webster, Robert C. Wheland
  • Preparation of 2-(pyridyl)ethyl bis-(trialkyl silyl)phosphonate derivatives substituted phosphorous compounds
    Patent number: 5258469
    Abstract: A process for producing phosphonate esters containing the 2-(pyridyl)ethyl group by reacting a vinylpyridine with a di- or trihydrocarbylphosphite in the presence of a selected silane, protic acid, or Lewis acid is disclosed. Also disclosed are novel silylphosphonate esters containing the 2-(pyridyl)ethyl group. All of the compounds produced herein are useful as catalysts for increasing the molecular weight of polyamides.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: November 2, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David L. Thorn, Owen W. Webster, Robert C. Wheland
  • Living cationic polymerization of alkyl vinyl ethers
    Patent number: 5196491
    Abstract: This invention relates to a process for the living cationic polymerization of vinylic unsaturated compounds containing electron donating substituents resulting in polymers of narrow molecular weight distribution.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: March 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Chang Cho, Ben-Ami Feit, Owen W. Webster
  • Preparation of 2-(pyridyl)ethyl bis-(trialkyl silyl)phosphonate derivatives
    Patent number: 5194616
    Abstract: A process for producing phosphonate esters containing the 2-(pyridyl)ethyl group by reacting a vinylpyridine with a di- or trihydrocarbylphosphite in the presence of a selected silane, protic acid, or Lewis acid is disclosed. Also disclosed are novel silylphosphonate esters containing the 2-(pyridyl)ethyl group. All of the compounds produced herein are useful as catalysts for increasing the molecular weight of polyamides.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: March 16, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David L. Thorn, Owen W. Webster, Robert C. Wheland
  • Resins with high surface areas and porosities
    Patent number: 4987157
    Abstract: Organic resins with high surface areas and porosities, which are insoluble in organic solvents and contain few or no flexible groups in the resin structure, are disclosed. Also disclosed is a process for making such resins from polyfunctional aryl alkali metal compounds and a second polyfunctional monomer. Such resins are useful as absorbants.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: January 22, 1991
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Bruce E. Smart, Owen W. Webster
  • "Living" polymers and process for their preparation
    Patent number: 4783500
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Owen W. Webster
  • "Living" polymers and process for their preparation
    Patent number: 4711942
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: December 8, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Owen W. Webster
  • "Living" polymers and process for their preparation
    Patent number: 4681918
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.
    Type: Grant
    Filed: November 21, 1981
    Date of Patent: July 21, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Owen W. Webster
  • Silylated vinyl alcohol polymers
    Patent number: 4544724
    Abstract: Silylated vinyl alcohol polymers and processes for their prepartion.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: October 1, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Dotsevi Y. Sogah, Owen W. Webster
  • "Living" polymers and process for their preparation
    Patent number: 4508880
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin, or -germanium initiators.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: April 2, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Owen W. Webster
  • Living polymers and process for their preparation
    Patent number: 4417034
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: November 22, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Owen W. Webster