Patents by Inventor Peter J. Maddox

Peter J. Maddox 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).

  • POLYOLEFIN COMPOSITION WITH MOLECULAR WEIGHT MAXIMUM OCCURING IN THAT PART OF THE COMPOSITION THAT HAS THE HIGHEST COMONOMER CONTENT
    Publication number: 20020165330
    Abstract: This invention relates to a polyolefin copolymer composition produced with a catalyst having a metallocene complex in a single reactor in a process for the polymerization of an &agr;olefin monomer with one or more olefin comonomers, and a molecular weight maximum which occurs in that 50 percent by weight of the composition which has the highest weight percent comonomer content. Preferably, the composition has a comonomer partitioning factor C pf which is equal to or greater than 1.10 or molecular weight partitioning factor M pf which is equal to or greater than 1.15. Preferred composition also have at least 0.01 long chain branches per 1000 carbon atoms along the polymer backbone. These compositions with reverse molecular engineering have superior properties and are easily processable due to the simultaneous presence of the association of high molecular weight with high comonomer content and of long chain branching.
    Type: Application
    Filed: November 6, 1998
    Publication date: November 7, 2002
    Inventors: LARRY D. CADY, CHRISTOPHER J. FRYE, PHILIP HOWARD, TERESA P. KARJALA, PETER J. MADDOX, IAN M. MUNRO, DEEPAK R. PARIKH, S. ROY PARTINGTON, KEVIN P. PEIL, LEE SPENCER, WILLIAM R. VAN VOLKENBURGH, PETER S. WILLIAMS, DAVID R. WILSON, J. MARK WINTER
  • Polyolefin composition with molecular weight maximum occurring in that part of the composition that has the highest comonomer content
    Patent number: 6462161
    Abstract: The invention relates to a polyolefin copolymer composition produced with a catalyst having a metallocene, complex in a single reactor for the polymer of an &agr;-olefin monomer with one or more olefin comonomers, and a molecule weight maximum which occurs in that 50 percent by weight of the composition which has the highest weight percent comonomer content. Preferably, the composition has a comonomer partitioning fact Cpf which is equal to or greater than 1.10 or molecule weight partitioning fact Mpf which is equal to or greater than 1.15. Preferred composition also have at least 0.01 long chain branches per 1000 carbon atoms along the polymer backbone. These compositions with reverse molecular engineering have. superior properties and are easily processable due to the simultaneous presence of the association of high molecular weight with high comonomer content and of long chain branching.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: October 8, 2002
    Assignee: BP Chemicals Limited
    Inventors: Larry D. Cady, Christopher J. Frye, Philip Howard, Teresa P. Karjala, Peter J. Maddox, Ian M. Munro, Deepak R. Parikh, S. Roy Partington, Kevin P. Peil, Lee Spencer, William R. Van Volkenburgh, Peter S. Williams, David R. Wilson, J. Mark Winter