Patents by Inventor Edmund A. Flexman

Edmund A. Flexman 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).

  • Polyoxymethylene/thermoplastic polyurethane/amorphous thermoplastic polymer blends
    Patent number: 5318813
    Abstract: This invention relates to blends containing (a) 40-98 weight percent polyoxymethylene, (b) 1-40 weight percent thermoplastic polyurethane, and (c) 1-59 weight percent of at least one amorphous thermoplastic polymer, said blends being characterized as having better mold shrinkage than polyoxymethylene/thermoplastic polyurethane compositions and also having a useful balance of physical properties, such as stiffness, elongation, and toughness.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 7, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Edmund A. Flexman, Jr.
  • Impact resistant polyoxymethylene compositions
    Patent number: 5286807
    Abstract: Polyoxymethylene compositions having 5-15 wt. thermoplastic polyurethane; where the polyurethane has a soft segment glass transition of lower than 0.degree. C., the polyoxymethylene has a molecular weight of 20,000-100,000, and the polyurethane is dispersed in the polyoxymethylene as discrete particles show extraordinary impact resistance as measured by Gardner impact.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: February 15, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edmund A. Flexman, Jr.
  • Polyamide-polyarylate composition containing elastomeric modifier and epoxy-functional copolymer
    Patent number: 4942200
    Abstract: Thermoplastic compositions consisting essentially of 25-80 weight percent polyamide, 10-70 weight percent polyarylate, 0.5-30 weight percent elastomeric modifier, and 0.5-7 weight percent epoxy functional polymer, where the epoxy functional polymer and the polyarylate are preblended with each other, show unexpectedly superior resistance to high speed puncture, even as compared with the same formulation absent preblending.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: July 17, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edmund A. Flexman, James J. Sosnowski
  • Polyester compositions for blow molding
    Patent number: 4912167
    Abstract: A blow moldable composition of a polyester, an epoxide polymer and a source of catalytic cations.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: March 27, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edward J. Deyrup, Edmund A. Flexman, Jr., King L. Howe
  • Toughened polyoxymethylene compositions
    Patent number: 4804716
    Abstract: Polyoxymethylene compositions having 15-40 wt. % thermoplastic polyurethane, where the polyurethane has a glass transition of lower than -15.degree. C., the polyoxymethylene has a molecular weight of 20,000-100,000, and the polyurethane is dispersed in the polyoxymethylene as small particles show extraordinary toughness as measured by notched Izod.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: February 14, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edmund A. Flexman, Jr.