Patents by Inventor Craig T. Einfeldt

Craig T. Einfeldt 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).

  • Patent number: 8877992
    Abstract: Conversion of waste and other organic feedstock into sustainable energy, feed, fertilizer, and other useful products of reliable purities is accomplished using water, heat, and pressure. More specifically, the invention provides methods and apparatus that handle mixed streams of various feedstocks, e.g. agricultural waste, biological waste, municipal solid waste, municipal sewage sludge, and shredder residue, to yield gas, oil, specialty chemicals, and carbon solids that can be used as is or are further processed. Useful products can be diverted at various points of the process or internalized to enhance the efficiency of the system.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: November 4, 2014
    Assignee: AB-CWT LLC
    Inventors: Brian S. Appel, Terry N. Adams, James H. Freiss, Craig T. Einfeldt, William F. Lange, Shannon M. Jones
  • Patent number: 8809606
    Abstract: Methods and apparatus for processing of waste and low-value products to produce useful materials in reliable purities and compositions, at acceptable cost, without producing malodorous emissions, and with high energy efficiency are disclosed. In particular, multi-stage processes are disclosed to convert various feedstocks such as offal, animal manures, municipal sewage sludge, tires, and plastics, that otherwise have little commercial value, to useful materials including gas, oil, specialty chemicals, and carbon solids. Disclosed processes subject the feedstock to heat and pressure, separates out various components, then further applies heat and pressure to one or more of those components. Various materials produced at different points in the process may be recycled and used to play other roles within the process. Also disclosed are apparatus for performing multi-stage processes of converting waste products into useful materials, and at least one oil product that arises from the process.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: August 19, 2014
    Assignee: AB-CWT LLC
    Inventors: Brian S. Appel, Terry N. Adams, Michael J. Roberts, William F. Lange, James H. Freiss, Craig T. Einfeldt, Michael Charles Carnesi
  • Publication number: 20090062581
    Abstract: Conversion of waste and other organic feedstock into sustainable energy, feed, fertilizer, and other useful products of reliable purities is accomplished using water, heat, and pressure. More specifically, the invention provides methods and apparatus that handle mixed streams of various feedstocks, e.g. agricultural waste, biological waste, municipal solid waste, municipal sewage sludge, and shredder residue, to yield gas, oil, specialty chemicals, and carbon solids that can be used as is or are further processed. Useful products can be diverted at various points of the process or internalized to enhance the efficiency of the system.
    Type: Application
    Filed: June 17, 2008
    Publication date: March 5, 2009
    Inventors: Brian S. Appel, Terry N. Adams, James H. Freiss, Craig T. Einfeldt, William F. Lange, Shannon M. Jones