Patents by Inventor Mark Henry Hartman

Mark Henry Hartman 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).

  • Impact modified melt-stable lactide polymer compositions and processes for manufacture thereof
    Patent number: 6495631
    Abstract: The invention is directed toward melt-processable lactide polymer compositions, processes for manufacturing these compositions, and articles made from these compositions. The compositions include a first phase, which contains a polylactide-based polymer, and a second phase which includes elastomer. The elastomer is present in an amount sufficient to provide a polymer composition having an impact resistance of at least about 0.7 ft-lb/in. after the melt-processable polymer composition has been injection molded into bars and tested according to ASTM D256 (1993) method C. Preferably, the compositions also include a reactive compatibilizing agent. Methods of making these compositions and articles made from these compositions are also disclosed.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: December 17, 2002
    Assignee: Cargill, Incorporated
    Inventors: Jed Richard Randall, Christopher Michael Ryan, James Lunt, Mark Henry Hartman, Eric Stanley Hall, Jeffrey John Kolstad, David Roy Witzke
  • Impact modified melt-stable lactide polymer compositions and processes for manufacture thereof
    Patent number: 5922832
    Abstract: The invention is directed toward melt-processable lactide polymer compositions, processes for manufacturing these compositions, and articles made from these compositions. The compositions include a first phase, which contains a polylactide-based polymer, and a second phase which includes elastomer. The elastomer is present in an amount sufficient to provide a polymer composition having an impact resistance of at least about 0.7 ft-lb/in. after the melt-processable polymer composition has been injection molded into bars and tested according to ASTM D256 (1993) method C. Preferably, the compositions also include a reactive compatibilizing agent. Methods of making these compositions and articles made from these compositions are also disclosed.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: July 13, 1999
    Assignee: Cargill, Incorporated
    Inventors: Jed Richard Randall, Christopher Michael Ryan, James Lunt, Mark Henry Hartman, Eric Stanley Hall, Jeffrey John Kolstad, David Roy Witzke