Patents by Inventor Liza Ruth Helmrick

Liza Ruth Helmrick 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).

  • Silicon based quaternary ammonium functional compositions and methods for making them
    Patent number: 6482969
    Abstract: There are disclosed novel quaternary ammonium functional silicones and silanes and methods to make quaternary ammonium functional silicones and silanes. Quaternary ammonium functionality may be provided through the use of cationizing agents.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: November 19, 2002
    Assignee: Dow Corning Corporation
    Inventors: Liza Ruth Helmrick, John Joseph Kennan