Patents by Inventor O. Daniel Evans

O. Daniel Evans 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).

  • Aboveground leak detection system for detecting sub-surface fluid leaks from fluid containing vessels
    Patent number: 6817227
    Abstract: An apparatus and method for sampling sub-surface soil gas samples and detection of distinctive chemical tracer compounds in the soil gas samples employing an aboveground sampling apparatus. The aboveground sampling apparatus does not include any device that penetrates the soil surface or man-made structures imposed upon the soil surface. Rather, the above-ground sampling apparatus evacuates soil gas samples through the soils surface or through mad-made structures imposed upon the soil surface, such as asphalt or concrete, and passes the soil gas sample through an adsorbent bed containing adsorbent material specific for the distinctive chemical tracer compounds.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: November 16, 2004
    Assignee: Praxair Technology, Inc.
    Inventors: Glenn M. Thompson, O. Daniel Evans
  • Aboveground leak detection system for detecting sub-surface fluid leaks from fluid containing vessels
    Publication number: 20030167861
    Abstract: An apparatus and method for sampling sub-surface soil gas samples and detection of distinctive chemical tracer compounds in the soil gas samples employing an aboveground sampling apparatus. The aboveground sampling apparatus does not include any device that penetrates the soil surface or man-made structures imposed upon the soil surface. Rather, the above-ground sampling apparatus evacuates soil gas samples through the soils surface or through mad-made structures imposed upon the soil surface, such as asphalt or concrete, and passes the soil gas sample through an adsorbent bed containing adsorbent material specific for the distinctive chemical tracer compounds.
    Type: Application
    Filed: March 11, 2002
    Publication date: September 11, 2003
    Inventors: Glenn M. Thompson, O. Daniel Evans