Patents by Inventor David Litzen

David Litzen 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).

  • Pretreatment of biomass for ethanol production
    Publication number: 20060141584
    Abstract: A pretreatment of biomass for ethanol production is disclosed. The pretreatment of biomass such as sawdust or wood chips by processing such biomass through an extruder results in a greatly increased recovery of sugar using hydrolysis.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 29, 2006
    Inventors: David Litzen, David Dixon, Patrick Gilcrease, Robb Winter
  • Farrier's tool
    Patent number: 6540027
    Abstract: Embodiments of a farrier's tool are disclosed which may to trim a horse's hoof. The farrier's tool of the instant invention employs a cam which amplifies the mechanical advantage of the tool such that the operator may trim a hoof using a single hand.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: April 1, 2003
    Inventors: David Litzen, Joseph Schneller, Ronald Bedard, John L. Schneller
  • Farrier's tool
    Publication number: 20020100172
    Abstract: Embodiments of a farrier's tool are disclosed which may to trim a horse's hoof. The farrier's tool of the instant invention employs a cam which amplifies the mechanical advantage of the tool such that the operator may trim a hoof using a single hand.
    Type: Application
    Filed: January 24, 2002
    Publication date: August 1, 2002
    Inventors: David Litzen, Joseph Schneller, Ronald Bedard, John L. Schneller