Patents by Inventor Michael K. Rinehart

Michael K. Rinehart 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).

  • Flame retardant polymer with stable polymeric additive
    Patent number: 5276091
    Abstract: Polymeric compositions, such as thermoplatic molding compositions, are rendered flame retardant by blending the base polymer with a stable interpolymer prepared by copolymerizing a brominated monovinyl aromatic monomer, a methacrylic acid ester and, optionally, an ethylenically unsaturated nitrile.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: January 4, 1994
    Assignee: General Electric Company
    Inventors: Michael K. Rinehart, Gerald Goldberg
  • Flame retardant polymer with stable polymeric additive
    Patent number: 5227443
    Abstract: Polymeric compositions, such as thermoplastic molding compositions, are rendered flame retardant by blending the base polymer with a stable interpolymer prepared by copolymerizing a brominated monovinyl aromatic monomer, a methacrylic acid ester and, optionally, an ethylenically unsaturated nitrile.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: July 13, 1993
    Assignee: General Electric Company
    Inventors: Michael K. Rinehart, Gerald Goldberg
  • Flame retardant blends of polycarbonate, ABS and a terpolymer
    Patent number: 5036126
    Abstract: Flame retardant polymer blend compositions comprise a polycarbonate polymer, an ABS resin, a phosphate ester flame retardant and a terpolymer formed from an aryl brominated monovinylic aromatic monomer, an ethylenically unsaturated nitrile monomer, and an alkyl methacrylate monomer in which the alkyl group has from 1 to 4 carbon atoms. A preferred terpolymer comprises a dibromostyrene-acrylonitrile-methyl methacrylate terpolymer.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: July 30, 1991
    Assignee: General Electric Company
    Inventors: Michael K. Rinehart, James J. Ziegelmeyer
  • Process for preparing polyphenylene ethers
    Patent number: 4463164
    Abstract: An improved method for the production of polyphenylene ethers is disclosed. The method comprises oxidatively coupling monohydric phenols in the presence of a complex catalyst and in a liquid medium which is a solvent for the monomer and catalyst and a non-solvent for the polyphenylene ether. The polyphenylene ether precipitates to form a slurry of particulate solids which is then washed with an aqueous solution of a chelating agent to remove catalyst residue.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: July 31, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: William O. Dalton, Michael K. Rinehart, Akitoshi Sugio
  • Process for preparing alpha-methylstyrene polymers
    Patent number: 4169195
    Abstract: Polymers containing greater than 60 wt% alpha methylstyrene, from 28 to 35 wt% acrylonitrile and from 0 to 7 wt% styrene having excellent color and usefully high molecular weights result from suspension polymerization of the monomer mixture above 90.degree. C. and employing monomer phase to aqueous phase ratios greater than 1:1.5.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: September 25, 1979
    Assignee: Borg-Warner Corporation
    Inventor: Michael K. Rinehart