The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2008
Filed:
Sep. 14, 2005
Donald Ross Kelsey, Guerneville, CA (US);
Cecilia Zuqi Tse, Katy, TX (US);
Robert Lawrence Blackbourn, Houston, TX (US);
Holger Georg Bachmann, Weiterstadt, DE;
Eckhard Seidel, Frankfurt am Main, DE;
Donald Ross Kelsey, Guerneville, CA (US);
Cecilia Zuqi Tse, Katy, TX (US);
Robert Lawrence Blackbourn, Houston, TX (US);
Holger Georg Bachmann, Weiterstadt, DE;
Eckhard Seidel, Frankfurt am Main, DE;
Shell Oil Company, Houston, TX (US);
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.