Patents by Inventor Duffer Crawford

Duffer Crawford 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).

  • Method for nitrogen rejection and or helium recovery in an LNG liquefaction plant
    Patent number: 8522574
    Abstract: Methods of reducing the concentration of low boiling point components in liquefied natural gas are disclosed. The methods involve dynamic decompression of the liquefied natural gas and one or more pre-fractionation vessels. Particular embodiments are suited for recovering helium and/or nitrogen enriched streams from a liquefied natural gas stream.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: September 3, 2013
    Assignee: Kellogg Brown & Root LLC
    Inventors: Duffer Crawford, David Coyle, Bharthwaj Anantharaman
  • Method for Nitrogen Rejection and or Helium Recovery in an Liquefaction Plant
    Publication number: 20100162755
    Abstract: Methods of reducing the concentration of low boiling point components in liquefied natural gas are disclosed. The methods involve dynamic decompression of the liquefied natural gas and one or more pre-fractionation vessels. Particular embodiments are suited for recovering helium and/or nitrogen enriched streams from a liquefied natural gas stream.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: KELLOGG BROWN & ROOT LLC
    Inventors: Duffer Crawford, David A. Coyle, Bharthwaj Anantharaman