Patents by Inventor Stephanie G. Wettstein

Stephanie G. Wettstein 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).

  • Solute-enhanced production of gamma-valerolactone (GVL) from aqueous solutions of levulinic acid
    Patent number: 9376411
    Abstract: A method to produce levulinic acid (LA) and gamma-valerolactone (GVL) from biomass-derived cellulose or lignocellulose by selective extraction of LA using GVL and optionally converting the LA so isolated into GVL, with no purifications steps required to yield the GVL.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: June 28, 2016
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Stephanie G. Wettstein, David Martin Alonso, Elif Ispir Gurbuz
  • SOLUTE-ENHANCED PRODUCTION OF GAMMA-VALEROLACTONE (GVL) FROM AQUEOUS SOLUTIONS OF LEVULINIC ACID
    Publication number: 20160090370
    Abstract: A method to produce levulinic acid (LA) and gamma-valerolactone (GVL) from biomass-derived cellulose or lignocellulose by selective extraction of LA using GVL and optionally converting the LA so isolated into GVL, with no purifications steps required to yield the GVL.
    Type: Application
    Filed: January 14, 2015
    Publication date: March 31, 2016
    Inventors: James A. Dumesic, Stephanie G. Wettstein, David Martin Alonso, Elif Ispir Gurbuz
  • Solute-enhanced production of gamma-valerolactone (GVL) from aqueous solutions of levulinic acid
    Patent number: 8962867
    Abstract: A method to produce levulinic acid (LA) and gamma-valerolactone (GVL) from biomass-derived cellulose or lignocellulose by selective extraction of LA using GVL and optionally converting the LA so isolated into GVL, with no purifications steps required to yield the GVL.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: February 24, 2015
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Stephanie G. Wettstein, David Martin Alonso, Elif Ispir Gurbuz
  • Production of levulinic acid, furfural, and gamma valerolactone from Cand Ccarbohydrates in mono- and biphasic systems using gamma-valerolactone as a solvent
    Patent number: 8399688
    Abstract: A method to make levulinic acid (LA), furfural, or gamma-valerolactone (GVL). React cellulose (and/or other C6 carbohydrates) or xylose (and/or other C5 carbohydrates) or combinations thereof in a monophasic reaction medium comprising GVL and an acid; or (ii) a biphasic reaction system comprising an organic layer comprising GVL, and a substantially immiscible aqueous layer. At least a portion of the cellulose (and/or other C6 carbohydrates), if present, is converted to LA and at least a portion of the xylose (and/or other C5 carbohydrates), if present, is converted into furfural.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: March 19, 2013
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, David Martin Alonso, Elif I. Gürbüz, Stephanie G. Wettstein
  • SOLUTE-ENHANCED PRODUCTION OF GAMMA-VALEROLACTONE (GVL) FROM AQUEOUS SOLUTIONS OF LEVULINIC ACID
    Publication number: 20120302766
    Abstract: A method to produce levulinic acid (LA) and gamma-valerolactone (GVL) from biomass-derived cellulose or lignocellulose by selective extraction of LA using GVL and optionally converting the LA so isolated into GVL, with no purifications steps required to yield the GVL.
    Type: Application
    Filed: December 15, 2011
    Publication date: November 29, 2012
    Inventors: James A. Dumesic, Stephanie G. Wettstein, David Martin Alonso, Elif Ispir Gurbuz
  • PRODUCTION OF LEVULINIC ACID, FURFURAL, AND GAMMA VALEROLACTONE FROM C5 and C6 CARBOHYDRATES IN MONO- AND BIPHASIC SYSTEMS USING GAMMA- VALEROLACTONE AS A SOLVENT
    Publication number: 20120302767
    Abstract: A method to make levulinic acid (LA), furfural, or gamma-valerolactone (GVL). React cellulose (and/or other C6 carbohydrates) or xylose (and/or other C5 carbohydrates) or combinations thereof in a monophasic reaction medium comprising GVL and an acid; or (ii) a biphasic reaction system comprising an organic layer comprising GVL, and a substantially immiscible aqueous layer. At least a portion of the cellulose (and/or other C6 carbohydrates), if present, is converted to LA and at least a portion of the xylose (and/or other C5 carbohydrates), if present, is converted into furfural.
    Type: Application
    Filed: April 12, 2012
    Publication date: November 29, 2012
    Inventors: James A. Dumesic, David Martin Alonso, Elif I. Gürbüz, Stephanie G. Wettstein