Patents by Inventor Joy Stafford-Evans

Joy Stafford-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).

  • Apparatus and methods for launching and receiving a broad wavelength range source
    Patent number: 7005645
    Abstract: An apparatus and method for simultaneous detection of N gas species through laser radiation attenuation techniques is disclosed. Each of the N species has a spectral absorption band. N laser sources operate at a wavelength ?N in a spectral absorption band separated by the cutoff wavelength for single-mode transmission. Each laser source corresponds to a gas species and transmits radiation through an optical fiber constructed and arranged to provide single-mode transmission with minimal power loss.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: February 28, 2006
    Assignees: Air Liquide America L.P., Physical Sciences, Inc.
    Inventors: William A. Von Drasek, David Sonnenfroh, Mark G. Allen, Joy Stafford-Evans
  • Apparatus and methods for launching and receiving a broad wavelength range source
    Publication number: 20030152307
    Abstract: An apparatus and method for simultaneous detection of N gas species through laser radiation attenuation techniques is disclosed. Each of the N species has a spectral absorption band. N laser sources operate at a wavelength &lgr;N in a spectral absorption band separated by the cutoff wavelength for single-mode transmission. Each laser source corresponds to a gas species and transmits radiation through an optical fiber constructed and arranged to provide single-mode transmission with minimal power loss.
    Type: Application
    Filed: November 14, 2002
    Publication date: August 14, 2003
    Inventors: William A. Von Drasek, David Sonnenfroh, Mark G. Allen, Joy Stafford-Evans