Patents by Inventor Clark R. Landis

Clark R. Landis 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).

  • Diazaphosphacycle transition metal complexes
    Patent number: 8058429
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal. The phosphorus atom of the diazaphosphacycle is bonded to the transition metal and the diazaphosphacycle of formula III has the following structure where the variables have the values set forth herein.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: November 15, 2011
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • DIAZAPHOSPHACYCLE TRANSITION METAL COMPLEXES
    Publication number: 20100222583
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal. The phosphorus atom of the diazaphosphacycle is bonded to the transition metal and the diazaphosphacycle of formula III has the following structure where the variables have the values set forth herein.
    Type: Application
    Filed: May 5, 2010
    Publication date: September 2, 2010
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycle transition metal complexes
    Patent number: 7737272
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal. The phosphorus atom of the diazaphosphacycle is bonded to the transition metal and the diazaphosphacycle of formula III has the following structure where the variables have the values set forth herein.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: June 15, 2010
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycles
    Patent number: 7507820
    Abstract: Diazaphosphacycles comprising compounds having the formula XI and salts of the compound are provided, wherein the variables W, T, R1, R14, and R15 are as described herein. Transition metal catalysts incorporating such diazaphosphacycles and methods of use thereof are also disclosed. There are further provided compositions comprising diazaphosphacycles covalently attached to a solid support and methods of use thereof.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: March 24, 2009
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark, Ryan C. Nelson
  • DIAZAPHOSPHACYCLE TRANSITION METAL COMPLEXES
    Publication number: 20080146798
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal. The phosphorus atom of the diazaphosphacycle is bonded to the transition metal and the diazaphosphacycle of formula III has the following structure where the variables have the values set forth herein.
    Type: Application
    Filed: February 15, 2008
    Publication date: June 19, 2008
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Synthesis of diazaphosphacycles
    Patent number: 7355073
    Abstract: A diazaphosphacycle may be synthesized by reacting a phosphine with a diimine and optionally one or more equivalents of an acid halide, a sulfonyl halide, a phosphoryl halide, or an acid anhydride in the substantial absence of O2 to form the diazaphosphacycle. The phosphine has the formula R1—PH2 where R1 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted ferrocenyl group.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 8, 2008
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycle transition metal complexes
    Patent number: 7355072
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal. The phosphorus atom of the diazaphosphacycle is bonded to the transition metal and the diazaphosphacycle of formula III has the following structure where the variables have the values set forth herein.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 8, 2008
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycles
    Patent number: 7071357
    Abstract: A diazaphosphacycle may be synthesized by reacting a phosphine with a diimine and optionally one or more equivalents of an acid halide, a sulfonyl halide, a phosphoryl halide, or an acid anhydride in the substantial absence of O2 to form the diazaphosphacycle. The phosphine has the formula R1—PH2 where R1 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted ferrocenyl group.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: July 4, 2006
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycles
    Publication number: 20050202507
    Abstract: Diazaphosphacycles comprising compounds having the formula XI and salts of the compound are provided, wherein the variables W, T, R1, R14, and R15 are as described herein. Transition metal catalysts incorporating such diazaphosphacycles and methods of use thereof are also disclosed. There are further provided compositions comprising diazaphosphacycles covalently attached to a solid support and methods of use thereof.
    Type: Application
    Filed: August 6, 2004
    Publication date: September 15, 2005
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark, Ryan C. Nelson
  • Diazaphosphacycle transition metal complexes
    Publication number: 20040176322
    Abstract: Transition metal complexes include a diazaphosphacycle of formula III and a transition metal.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 9, 2004
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Synthesis of diazaphosphacycles
    Publication number: 20040171856
    Abstract: A diazaphosphacycle may be synthesized by reacting a phosphine with a diimine and optionally one or more equivalents of an acid halide, a sulfonyl halide, a phosphoryl halide, or an acid anhydride in the substantial absence of O2 to form the diazaphosphacycle. The phosphine has the formula R1—PH2 where R1 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted ferrocenyl group.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 2, 2004
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Diazaphosphacycles
    Publication number: 20030055254
    Abstract: A diazaphosphacycle may be synthesized by reacting a phosphine with a diimine and optionally one or more equivalents of an acid halide, a sulfonyl halide, a phosphoryl halide, or an acid anhydride in the substantial absence of O2 to form the diazaphosphacycle. The phosphine has the formula R1-PH2 where R1 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted ferrocenyl group.
    Type: Application
    Filed: July 23, 2001
    Publication date: March 20, 2003
    Inventors: Clark R. Landis, Wiechang Jin, Jonathan S. Owen, Thomas P. Clark
  • Process for the preparation of phenylpyruvic acid from benzyl chloride
    Patent number: 4948920
    Abstract: A process for producing phenylpyruvic acid by reacting benzyl chloride with carbon monoxide in the presence of a catalytic amount of a metal carbonyl compound and an inorganic base, in an acetonitrile/water solvent.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: August 14, 1990
    Assignee: The NutraSweet Company
    Inventors: Clark R. Landis, Hayat Khowaja