Patents by Inventor Doug Bartelt

Doug Bartelt 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).

  • High efficiency single pass shredder-granulator
    Patent number: 8128013
    Abstract: The present invention is a shredder-granulator comprised of a plurality of rotary shear blades and a plurality of stationary bed knives fixedly attached to two counter-rotating shafts. The stationary bed knives are also secured to a frame. The shredder-granulator is capable of shredding and granulating materials in a single pass.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: March 6, 2012
    Inventors: Doug Bartelt, Joseph Bartelt
  • High Efficiency Single Pass Shredder-Granulator
    Publication number: 20110062263
    Abstract: The present invention is a shredder-granulator comprised of a plurality of rotary shear blades and a plurality of stationary bed knives fixedly attached to two counter-rotating shafts. The stationary bed knives are also secured to a frame. The shredder-granulator is capable of shredding and granulating materials in a single pass.
    Type: Application
    Filed: August 4, 2010
    Publication date: March 17, 2011
    Inventors: Doug Bartelt, Joseph Bartelt