Patents by Inventor Andrew Joseph Sivak

Andrew Joseph Sivak 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).

  • Patent number: 6465385
    Abstract: The present invention is a new catalyst compositions and methods of making and using the same. These compositions comprise organometallic salts with large noncoordinating anions which contain at least one terminal unsaturation and the high dipole moment Zwitterions that these can isomerize into. During polymerization, the ionic pairs are dispersed within the polymer particles. The length of space separating the positive and negative end of the Zwitterion also increase as a consequence of polymerization. Additionally, polymerization proceeds without the need of a co-catalyst.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: October 15, 2002
    Assignee: Sunoco, Inc. (R&M)
    Inventors: Andrew Joseph Sivak, Adolfo Zambelli