Patents by Inventor Lawrence A. Siwajek

Lawrence A. Siwajek 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).

  • Landfill gas recovery
    Patent number: 5842357
    Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a reduced amount of carbon dioxide absorbent which itself may be an in situ derived and recoverable constituent. Separated methane may be concentrated into a high heating value fuel, and a highly pure food-grade carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and/or to regenerate carbon dioxide absorbent.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: December 1, 1998
    Assignee: Acrion Technologies, Inc.
    Inventors: Lawrence A. Siwajek, W. Jeffrey Cook, William R. Brown
  • Landfill gas recovery
    Patent number: 5681360
    Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a reduced amount of carbon dioxide absorbent which itself may be an in situ derived and recoverable constituent. Separated methane may be concentrated into a high heating value fuel, and a highly pure food-grade carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and/or to regenerate carbon dioxide absorbent.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: October 28, 1997
    Assignee: Acrion Technologies, Inc.
    Inventors: Lawrence A. Siwajek, W. Jeffrey Cook, William R. Brown