Patents by Inventor Kathryn E. Schwiebert

Kathryn E. Schwiebert 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).

  • Bidentate organic phosphite ligands and compositions
    Patent number: 6399534
    Abstract: This invention relates to multidentate organic phosphite ligands and their compositions with Group VIII metals.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: June 4, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Emilio E. Bunel, Helen S. M. Lu, Kenneth Gene Moloy, Shawn H. Phillips, Kathryn E. Schwiebert, Wilson Tam, Nora Radu
  • Phosphonite ligands, catalyst compositions and hydroformylation process utilizing same
    Patent number: 6362354
    Abstract: Phosphonite ligands, catalyst compositions containing such ligands and a hydroformylation process using such catalyst compositions involving a bidentate phosphonite ligand having the structure represented by the following wherein the Ar groups are either the same or different unbridged organic aromatic groups such as substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, mixtures thereof or the like are disclosed. The ligands in combination with a Group VIII metal or Group VIII metal compound are particularly useful in a hydroformylation process for reacting an ethylenically unsaturated compound to produce linear alkenals at high selectivity.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: March 26, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Emilio Enrique Bunel, Kathryn E. Schwiebert
  • Hydroformylation of acyclic monoethylenically unsaturated compounds to corresponding terminal aldehydes
    Patent number: 6307107
    Abstract: A process for hydroformylatiog acyclic monoethylenically unsaturated compounds to corresponding terminal aldehydes using a Group VIII transition metal and selected multidentate phosphite ligands.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: October 23, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Emilio E. Bunel, Helen S. M. Lu, Kenneth Gene Moloy, Shawn H. Phillips, Kathryn E. Schwiebert, Wilson Tam, Nora Radu