Patents by Inventor Ann Marie Hellstern

Ann Marie Hellstern 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).

  • Method and organopolysiloxane/organic polymeric compositions obtained therefrom
    Patent number: 5106900
    Abstract: The emulsion polymerization of a mixture of organic silicon monomers and vinyl containing organic monomer is effected substantially concurrently. Flocculation of the emulsion polymerized material, and recovery of the flocculated material has been found useful in providing multi-lobed impact modifiers for a variety of organic thermoplastic polymers.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: April 21, 1992
    Assignee: General Electric Company
    Inventors: Ann Marie Hellstern, Linda L. Mitchell, Robert J. Halley