Patents by Inventor Douglas STEPHAN

Douglas STEPHAN 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).

  • Ruthenium-based complex catalysts
    Patent number: 9828401
    Abstract: The present invention provides novel Ruthenium-based transition metal complex catalysts comprising specific ligands, their preparation and their use in hydrogenation processes. Such complex catalysts are inexpensive, thermally robust, and olefin selective.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: November 28, 2017
    Assignees: ARLANXEO DEUTSCHLAND GMBH, The Governing Council of University of Toronto
    Inventors: Julia Maria Jeschko, Douglas Stephan, Clinton Lund, Michael Sgro, Christopher Ong, Renan Cariou
  • Bis(2-indenyl) metallocene complex
    Patent number: 9156929
    Abstract: The invention relates to a metallocene complex according to the following formula (1) wherein R1 and R2 are the same or different and are a substituted or unsubstituted, linear or branched, hydrocarbyl group comprising 1 to 30 carbon atoms; M is titanium, zirconium, or hafnium and X1 and X2 are the same and are halogen or a hydrocarbyl group comprising 1 to 20 carbon atoms.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: October 13, 2015
    Assignee: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Haif Al-Shammari, Jason Morton, Douglas Stephan
  • RUTHENIUM-BASED COMPLEX CATALYSTS
    Publication number: 20150057450
    Abstract: The present invention provides novel Ruthenium-based transition metal complex catalysts comprising specific ligands, their preparation and their use in hydrogenation processes. Such complex catalysts are inexpensive, thermally robust, and olefin selective.
    Type: Application
    Filed: August 15, 2012
    Publication date: February 26, 2015
    Applicants: LANXESS DEUTSCHLAND GMBH, THE GOVERNING COUNCIL OF UNIVERSITY OF TORONTO
    Inventors: Julia Maria Jeschko, Douglas Stephan, Clinton Lund, Michael Sgro, Christopher Ong, Renan Cariou
  • BIS(2-INDENYL) METALLOCENE COMPLEX
    Publication number: 20140275455
    Abstract: The invention relates to a metallocene complex according to the following formula (1) wherein R1 and R2 are the same or different and are a substituted or unsubstituted, linear or branched, hydrocarbyl group comprising 1 to 30 carbon atoms; M is titanium, zirconium, or hafnium and X1 and X2 are the same and are halogen or a hydrocarbyl group comprising 1 to 20 carbon atoms.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Haif AL-SHAMMARI, Jason MORTON, Douglas STEPHAN