Patents by Inventor Robert Blackbourn

Robert Blackbourn 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).

  • Polytrimethylene terephthalate having a low level of acrolein and a process for producing the same
    Publication number: 20060084783
    Abstract: The present invention provides a process of reducing acrolein byproduct from polytrimethylene terephthalate using selected phosphorous compounds to contact the polytrimethylene terephthalate or reactants in the process of producing polytrimethylene terephthalate. The selected phosphorous compounds are retained in the polytrimethylene terephthalate. The present invention also provides polytrimethylene terephthalate compositions containing amounts of phosphorous compounds.
    Type: Application
    Filed: September 14, 2005
    Publication date: April 20, 2006
    Inventors: Donald Kelsey, Cecilia Tse, Robert Blackbourn, Holger Bachmann, Eckhard Seidel
  • Process for increasing the toughness of solid state polymerized poly (trimethylene terephthalate) pellets
    Publication number: 20050075479
    Abstract: This invention is a process for increasing the toughness of solid state polymerized (SSP) poly(trimethylene terephthalate) (PTT) pellets which have an intrinsic viscosity of about 0.7 dl/g or greater prior to extrusion. The process comprises extruding the PTT SSP pellets at a temperature of about 245 to about 280° C for from about 1 minute to about 20 minutes, cutting the PTT into pellets, and crystallizing the PTT pellets to about 10 to about 45 percent crystallinity.
    Type: Application
    Filed: October 1, 2004
    Publication date: April 7, 2005
    Inventors: Robert Blackbourn, Houston Brown, Donald Kelsey, Kathleen Kiibler, Wen-Tzung Tang