Patents Assigned to El Paso Natural Gas
  • Low power optically coupled serial data link
    Patent number: 6590687
    Abstract: The invention relates to a system for optically transmitting digital information.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: July 8, 2003
    Assignee: El Paso Natural Gas
    Inventor: Stewart L. Olsen
  • In-line electric motor driven compressor
    Patent number: 6261070
    Abstract: The present invention relates to an in-line electric motor driven compressor station that uses an in-line electric motor driven compressor to transport gas through a pipeline. This station can operate with greater flexibility and reduce costs because either axial or centrifugal compressors can be used, the motor can be immersed in the gas stream or cooled by air, and the station can actually be used to generate electricity. While overcoming the deficiencies of conventional compressor stations, an in-line electric motor driven compressor station offers operators a longer lasting, improved way to maintain the necessary pressures in a gas pipeline.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: July 17, 2001
    Assignee: El Paso Natural Gas Company
    Inventor: Anders T. Johnson
  • Data communication interface device
    Patent number: 5051980
    Abstract: A Data Communication Device permits extended range RS-232 communications between two devices by utilizing a current loop between the remote device and the Data Communication Device. The Data Communication Device may be used for any mix of signal or control lines specified for RS-232 and will support multiple remote devices in a broadcast mode or half duplex polled mode. Only a single Data Communication Device per remote communications circuit is required.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: September 24, 1991
    Assignee: El Paso Natural Gas Company
    Inventor: Stewart L. Olsen
  • Methanation process for the production of an alternate fuel for natural gas
    Patent number: 4005996
    Abstract: A process is provided for the catalytic enrichment of a gas having a low BTU level and which has been derived from the gasification of coal and which has been scrubbed for removal of impurities and for the partial removal of carbon dioxide. The process involves the catalytic methanation of hydrogen and carbon oxides over a highly active catalyst in multiple stages to produce methane and steam. The cold scrubbed feed gas is brought up to reaction temperature by heat exchange with recycled product gas from the first stage of methanation, which in admixture with said feed gas acts additionally to modify the composition of said feed gas to bring it outside of the carbon forming range at the outlet of the reactor and to supply steam to said feed gas to prevent carbon deposition on to the catalyst and to absorb the heat of reaction. The enriched product gas after removal of water is interchangeable with natural gas and is of pipeline quality.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: February 1, 1977
    Assignee: El Paso Natural Gas Company
    Inventors: Arthur L. Hausberger, Gene A. Hammons