Patents by Inventor Holger Georg Bachmann

Holger Georg Bachmann 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: 20080194793
    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: April 11, 2008
    Publication date: August 14, 2008
    Inventors: Donald Ross KELSEY, Cecilia Zuqi Tse, Robert Lawrence Blackbourn, Holger Georg Bachmann, Eckhard Seidel
  • Polytrimethylene terephthalate having a low level of acrolein and a process for producing the same
    Patent number: 7381787
    Abstract: The present invention provides a process of reducing acrolein by product from polytrimethylene terephthalate using selected phosphorus compounds to contact the polytrimethylene terephthalate or reactants in the process of producing polytrimethylene terephthalate. The selected phosphorus compounds are retained in the polytrimethylene terephthalate. The present invention also provides polytrimethylene terephthalate compositions containing amounts of phosphorus compounds.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: June 3, 2008
    Assignee: Shell Oil Company
    Inventors: Donald Ross Kelsey, Cecilia Zuqi Tse, Robert Lawrence Blackbourn, Holger Georg Bachmann, Eckhard Seidel