Patents by Inventor Jerald R. Harrell

Jerald R. Harrell 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 modifying the viscosity of copolymers of ethylene and unsaturated carboxylic acids
    Patent number: 5214108
    Abstract: The viscosity of copolymers of a) ethylene, b) C.sub.1 -C.sub.8 acrylates, C.sub.1 -C.sub.8 methacrylates, or vinyl esters of C.sub.1 -C.sub.8 carboxylic acids, and c) at least one alpha, beta-unsaturated carboxylic acid of 3-12 carbon atoms selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and monoesters of dicarboxylic acids is increased, while maintaining gel content at a level of less than 3%, by treatment with a mixture of an organic peroxide and a chromium (III) salt.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: May 25, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jerald R. Harrell
  • Process for modifying visosity of ethylene copolymers
    Patent number: 5194516
    Abstract: The viscosity of copolymers of a) ethylene and C.sub.1 -C.sub.8 acrylate or methacrylates or b) ethylene, vinyl esters of C.sub.1 -C.sub.4 carboxylic acids, and another comonomer selected from the group consisting of carbon monoxide, acrylic acid, methacrylic acid, or a glycidyl ester of acrylic or methacrylic acid is increased, while maintaining gel content at a level of less than 3%, by treatment with a free radical generating agent.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: March 16, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John R. Fisher, Jerald R. Harrell, Wolfgang Honsberg, John W. Paul
  • Ethylene copolymer compositions
    Patent number: 4839412
    Abstract: Certain ethylene copolymers that contain an ethylene/anhydride graft copolymer and a magnesium hydroxide or aluminum trihydrate flame and smoke retardant have a good balance of strength and flame and smoke retardant properties. The compositions preferably also contain polyethylene, and/or ionomeric ethylene copolymer and/or an ethylene/propylene elastomer.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Jerald R. Harrell, Lawrence C. Muschiatti
  • Blowing agents as curatives for ethylene/carbon monoxide copolymers
    Patent number: 4391922
    Abstract: Mono- and polyazoformamide, sulfonyl hydrazide, sulfonyl semicarbazide and/or dinitrosomethylene amine compounds act as chemical blowing agents and curatives for carbon monoxide-containing ethylene copolymers.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: July 5, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jerald R. Harrell