Patents by Inventor Philip S. Blatz

Philip S. Blatz 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).

  • Toughened thermoplastic polyester compositions
    Patent number: 5277864
    Abstract: Toughened semi-crystalline thermoplastic polyester molding compositions consisting essentially of a polyester resin and an ionomer of ethylene, a softening comonomer and unsaturated carboxylic acid, such as ethylene/n-butyl acrylate/methacrylic acid.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: January 11, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Philip S. Blatz
  • Barrier blends based on amorphous polyamide and ethylene/vinyl alcohol, unaffected by humidity
    Patent number: 5194306
    Abstract: A blend consisting essentially of a major portion of an amorphous polyamide and a minor portion of an ethylene vinyl alcohol copolymer exhibits gas barrier properties which are less dependent on humidity than are those of either of the component polymers. Films and laminated structures which incorporate the material of these blends are suitable for use as packaging materials.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: March 16, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip S. Blatz
  • Direct fabrication
    Patent number: 5130076
    Abstract: Melt fabrication, with precompounding, of a plurality of thermoplastic resins, is provided by use of a screw having a dispersion section in such machines as injection molding machines. The minor resin component can be an elastomer, which toughens the resin's major component. This effect is improved by increasing back pressure on the screw used in the injection molding machine, to extend the screw rotation and thus shear time accomplished by the dispersion section.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: July 14, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip S. Blatz, Paul N. Richardson, Pallatheri M. Subramanian
  • Barrier blends based on amorphous polyamide and ethylene/vinyl alcohol, unaffected by humidity
    Patent number: 5110855
    Abstract: A blend consisting essentially of a major portion of an amorphous polyamide and a minor portion of an ethylene vinyl alcohol copolymer exhibits gas barrier properties which are less dependent on humidity than are those of either of the component polymers. Films and laminated structures which incorporate the material of these blends are suitable for use as packaging materials.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: May 5, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip S. Blatz
  • Barrier blends based on amorphous polyamide and ethylene/vinyl alcohol, unaffected by humidity
    Patent number: 4952628
    Abstract: A blend consisting essentially of a major portion of an amorphous polyamide and a minor portion of an ethylene vinyl alcohol copolymer exhibits gas barrier properties which are less dependent on humidity than are those of either of the component polymers. Films and laminated structures which incorporate the material of these blends are suitable for use as packaging materials.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: August 28, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Philip S. Blatz
  • Adhesive blends containing thermally grafted ethylene polymer
    Patent number: 4230830
    Abstract: Polymeric blends particularly useful as adhesives for nylon prepared from an ethylene polymer and a second polymer grafted with maleic anhydride.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: October 28, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stephen R. Tanny, Philip S. Blatz