Patents by Inventor Keith W. Hutchenson

Keith W. Hutchenson 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).

  • PROCESSES FOR THE HYDROTHERMAL PRODUCTION OF TITANUIM DIOXIDE
    Publication number: 20080156229
    Abstract: The present invention provides hydrothermal processes for the production of titanium dioxide from titanyl hydroxide. The use of specific crystallization directors, or additives, can promote the formation of rutile, anatase, or brookite. Variation of process operating parameters can lead to either pigmentary-sized or nano-sized rutile.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: DAVID RICHARD CORBIN, KEITH W. HUTCHENSON, SHENG LI, CARMINE TORARDI, EUGENE MICHAEL MCCARRON
  • PROCESSES FOR PRODUCING TITANIUM DIOXIDE
    Publication number: 20080159933
    Abstract: Provided are processes for the production of titanium dioxide from ilmenite. In these processes, ilmenite is digested with aqueous ammonium hydrogen oxalate. Iron from the ilmenite precipitates as a hydrated iron oxalate and is removed by filtering, leaving a titanium-rich solution. The titanium-rich solution can be further processed to form titanium dioxide.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: DAVID RICHARD CORBIN, THOMAS PAUL GRIFFIN, KEITH W. HUTCHENSON, SHENG LI, MARK BRANDON SHIFLETT, CARMINE TORARDI, JOSEPH J. ZAHER
  • Methylenelactones syntheses in supercritical fluids
    Patent number: 7314942
    Abstract: Alpha-methylenelactone is produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: January 1, 2008
    Assignee: E. I. duPont de Nemours & Co.
    Inventors: Keith W. Hutchenson, Leo E. Manzer
  • Liquid phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7205416
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that exhibits high conversion and selectivity.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: April 17, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Liquid phase synthesis of methylene lactones using novel catalyst
    Patent number: 7199254
    Abstract: Process for converting certain lactones to their alpha-methylene derivatives in the liquid phase with both high conversion and selectivity using easily recoverable novel heterogeneous catalysts.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: April 3, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Supercritical fluid phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7166727
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms in a supercritical or near-critical fluid phase reaction using a novel grafted catalyst that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 23, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Gas phase synthesis of methylene lactones using novel catalyst
    Patent number: 7164033
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 16, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernst Manzer
  • Supercritical fluid phase synthesis of methylene lactones using novel catalyst field of invention
    Patent number: 7164032
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also provides high reactor productivity (mass of product per mass of catalyst per unit of time) and sustained maintenance of a high level of activity and productivity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 16, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Gas phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7161014
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 9, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Supercritical fluid phase synthesis of methylene lactones using oxynitride catalyst
    Patent number: 7153981
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms in a supercritical or near-critical fluid phase reaction using an oxynitride catalyst or a composite oxynitride catalyst incorporating lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium or combinations thereof.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 26, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Gas phase synthesis of methylene lactones using oxynitride catalyst
    Patent number: 7151185
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms using an oxynitride catalyst or a composite oxynitride catalyst incorporating lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium or combinations thereof.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 19, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Liquid phase synthesis of methylene lactones using oxnitride catalyst
    Patent number: 7141682
    Abstract: Process for converting certain lactones to their alpha-methylene derivatives in the liquid phase using oxynitride catalysts or composite catalysts incorporating dithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium or combinations thereof.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: November 28, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Production of 5-methyl-dihydro-furan-2-one from levulinic acid in supercritical media
    Patent number: 6946563
    Abstract: This invention relates to a process for producing 5-methyl-dihydro-furan-2-one from levulinic acid in presence of a supercritical fluid, and in presence of optionally-supported metal catalyst.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: September 20, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Leo Ernest Manzer, Keith W. Hutchenson
  • Production of 5-methyl-dihydro-furan-2-one from levulinic acid in supercritical media
    Publication number: 20040254384
    Abstract: This invention relates to a process for producing 5-methyl-dihydro-furan-2-one from levulinic acid in presence of a supercritical fluid, and in presence of optionally-supported metal catalyst.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 16, 2004
    Inventors: Leo Ernest Manzer, Keith W. Hutchenson
  • Methylenelactone synthesis in supercritical fluids
    Patent number: 6649776
    Abstract: Alpha-methylenelactones are produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid in the presence of a catalyst and a phase transfer agent.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: November 18, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Leo E. Manzer, Keith W. Hutchenson
  • Methylenelactones syntheses in supercritical fluids
    Publication number: 20030166949
    Abstract: Alpha-methylenelactone is produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid.
    Type: Application
    Filed: January 7, 2003
    Publication date: September 4, 2003
    Inventors: Leo E. Manzer, Keith W. Hutchenson
  • Methylenelactone synthesis in supercritical fluids
    Publication number: 20030158425
    Abstract: Alpha-methylenelactones are produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid in the presence of a catalyst and a phase transfer agent.
    Type: Application
    Filed: January 7, 2003
    Publication date: August 21, 2003
    Inventors: Leo E. Manzer, Keith W. Hutchenson