Patents by Inventor Fred A. Keller

Fred A. Keller 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).

  • Ethanol production with dilute acid hydrolysis using partially dried lignocellulosics
    Patent number: 6660506
    Abstract: A process of converting lignocellulosic biomass to ethanol, comprising hydrolyzing lignocellulosic materials by subjecting dried lignocellulosic material in a reactor to a catalyst comprised of a dilute solution of a strong acid and a metal salt to lower the activation energy (i.e., the temperature) of cellulose hydrolysis and ultimately obtain higher sugar yields.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: December 9, 2003
    Assignee: Midwest Research Institute
    Inventors: Quang A. Nguyen, Fred A. Keller, Melvin P. Tucker
  • ETHANOL PRODUCTION WITH DILUTE ACID HYDROLYSIS USING PARTIALLY DRIED LIGNOCELLULOSICS
    Publication number: 20030199049
    Abstract: In a process for converting lingnocellulosic biomass to ethanol, the improvement of obtaining higher fermentable soluble sugar yields by drying acid impregnated biomass particles, comprising:
    Type: Application
    Filed: February 7, 2003
    Publication date: October 23, 2003
    Inventors: Quang A. Nguyen, Fred A. Keller, Melvin P. Tucker
  • Pentose fermentation of normally toxic lignocellulose prehydrolysate with strain of Pichia stipitis yeast using air
    Patent number: 6498029
    Abstract: Strains of the yeast Pichia stipitis NPw9 (ATCC PTA-3717) useful for the production of ethanol using oxygen for growth while fermenting normally toxic lignocellulosic prehydrolysates.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: December 24, 2002
    Assignee: Midwest Research Institute
    Inventors: Fred A. Keller, Jr., Quang A. Nguyen
  • Pentose fermentation of normally toxic lignocellulose prehydrolysate with strain of Pichia stipitis yeast using air
    Publication number: 20010036659
    Abstract: Strains of the yeast Pichia stipitis NPw9 useful for the production of ethanol using oxygen for growth while fermenting normally toxic lignocellulosic prehydrolysates.
    Type: Application
    Filed: June 21, 2001
    Publication date: November 1, 2001
    Inventors: Fred A. Keller, Quang A. Nguyen