Patents by Inventor John Chirillo, Jr.

John Chirillo, Jr. 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).

  • Processes for transitioning between chrome-based and mixed polymerization catalysts
    Patent number: 6841630
    Abstract: Processes for transitioning among polymerization catalyst systems, preferably catalyst systems, which are incompatible with each other. Particularly, processes for transitioning among olefin polymerization reactions utilizing silyl-chromate catalyst systems and metallocene catalyst systems.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: January 11, 2005
    Assignee: Univation Technologies, LLC
    Inventors: Kersten Anne Terry, Mark Gregory Goode, Daniel E. Wente, John Chirillo, Jr., Simon Mawson, Jose Fernando Cevallos-Candau