Patents by Inventor Sharon E. Peterson

Sharon E. Peterson 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).

  • Propylene/butene interpolymer production system and method
    Patent number: 9624323
    Abstract: The present disclosure provides a process. In an embodiment, the process includes producing a propylene-based polymer in a gas-phase polymerization reactor (10) under polymerization conditions. The polymerization conditions include a combined propylene-plus-propane partial pressure from 290 psia to 450 psia. The process further includes maintaining the combined propylene-plus-propane partial pressure in the range from 290 psia to 450 psia while simultaneously: (i) reducing propylene partial pressure in the gas-phase polymerization reactor; (ii) adding propane to the gas-phase polymerization reactor; (iii) introducing at least one C4-C10 comonomer into the gas-phase polymerization reactor (26); and forming a propylene/C4-C10 interpolymer in the gas-phase polymerization reactor (44).
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 18, 2017
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Sharon E. Peterson, Mark W. Blood, Theodore Duncan