Patents by Inventor George Yanwu Li

George Yanwu Li 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).

  • Polymer-supported phosphorus ligands for catalysts
    Patent number: 7238841
    Abstract: Novel phosphine and phosphine oxide ligands are prepared using polymeric supports. These compounds can be easily cleaved from the support, and along with the corresponding supported compounds, used as ligands in the preparation of novel, metal-complexed catalysts.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: July 3, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li
  • Polymer-supported phosphorus ligands for catalysis
    Patent number: 7098261
    Abstract: Novel phosphine and phosphine oxide ligands are prepared using polymeric supports. These compounds can be easily cleaved from the support, and along with the corresponding supported compounds, used as ligands in the preparation of novel, metal-complexed catalysts.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: August 29, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li
  • Phosphole and diphosphole ligands for catalysis
    Patent number: 6903182
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: June 7, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Phosphole and diphosphole ligands for catalysis
    Publication number: 20040225092
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Application
    Filed: June 7, 2004
    Publication date: November 11, 2004
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Phosphole and dishosphole ligands for catalysis
    Patent number: 6800719
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: October 5, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Polymer-supported phosphorus ligands for catalysts
    Publication number: 20030228629
    Abstract: Novel phosphine and phosphine oxide ligands are prepared using polymeric supports. These compounds can be easily cleaved from the support, and along with the corresponding supported compounds, used as ligands in the preparation of novel, metal-complexed catalysts.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 11, 2003
    Inventors: Paul J. Fagan, George Yanwu Li
  • Phosphole and dishosphole ligands for catalysis
    Publication number: 20030225226
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Application
    Filed: April 11, 2003
    Publication date: December 4, 2003
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Phosphole and diphosphole ligands for catalysis
    Patent number: 6579999
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: June 17, 2003
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Polymer-supported phosphorus ligands for catalysis
    Publication number: 20030104476
    Abstract: Novel phosphine and phosphine oxide ligands are prepared using polymeric supports. These compounds can be easily cleaved from the support, and along with the corresponding supported compounds, used as ligands in the preparation of novel, metal-complexed catalysts.
    Type: Application
    Filed: July 1, 2002
    Publication date: June 5, 2003
    Inventors: Paul J. Fagan, George Yanwu Li
  • Phosphole and diphosphole ligands for catalysis
    Publication number: 20020169340
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Application
    Filed: November 13, 2001
    Publication date: November 14, 2002
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Phosphole and diphosphole ligands for catalysis
    Patent number: 6350903
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: February 26, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang
  • Catalysis using phosphine oxide compounds
    Patent number: 6291722
    Abstract: Phosphine oxide compounds were used with transition metals, preferably palladium and nickel, to produce biaryls and arylamines via cross-coupling reactions with aryl halides and arylboronic acids, aryl Grignard reagents or amines.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: September 18, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: George Yanwu Li
  • Phosphole and diphosphole ligands for catalysis
    Patent number: 6137012
    Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: October 24, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul J. Fagan, George Yanwu Li, Zhibin Guan, Lin Wang