Patents by Inventor John R. Butnor

John R. Butnor 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).

  • Automated carbon efflux system
    Patent number: 6692970
    Abstract: A method and apparatus are provided for measuring the gas efflux from a substrate. In particular, one or more measuring chambers receive a gas enriched air from the substrate. A respiration system sends reference air having a known gas concentration to the measuring chamber. The reference air mixes with the gas enriched air to form a mixed air, which is returned to the respiration system. The respiration system then measures the gas efflux of the substrate over the given amount of time.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: February 17, 2004
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: John R. Butnor, Christopher A. Maier, Kurt H. Johnsen
  • Automated carbon efflux system
    Publication number: 20020000226
    Abstract: A method and apparatus are provided for measuring the gas efflux from a substrate. In particular, one or more measuring chambers receive a gas enriched air from the substrate. A respiration system sends reference air having a known gas concentration to the measuring chamber. The reference air mixes with the gas enriched air to form a mixed air, which is returned to the respiration system. The respiration system then measures the gas efflux of the substrate over the given amount of time.
    Type: Application
    Filed: January 5, 2001
    Publication date: January 3, 2002
    Inventors: John R. Butnor, Christopher A. Maier, Kurt H. Johnsen