Patents by Inventor Donald Hugh Stedman

Donald Hugh Stedman 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).

  • Patent number: 8838396
    Abstract: Water droplets in exhaust gas that is, or was, analyzed by a remote emissions sensing system are detected. The detection may be made using measurements generally captured by the remote emissions sensing system during typical operation. As such, the detection may be applied “on site” as remote emissions sensing analysis is ongoing, or may be applied post hoc from data previously acquired by a remote emissions sensing system. The detection may be implemented without requiring additional sensors, more sophisticated sensors, and/or other additional or more sophisticated equipment being included in the remote emissions sensing system.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: September 16, 2014
    Assignee: Envirotest Systems Holdings Corp.
    Inventors: Robert Allen Gentala, Peter Miles McClintock, Donald Hugh Stedman
  • Publication number: 20130253849
    Abstract: Water droplets in exhaust gas that is, or was, analyzed by a remote emissions sensing system are detected. The detection may be made using measurements generally captured by the remote emissions sensing system during typical operation. As such, the detection may be applied “on site” as remote emissions sensing analysis is ongoing, or may be applied post hoc from data previously acquired by a remote emissions sensing system. The detection may be implemented without requiring additional sensors, more sophisticated sensors, and/or other additional or more sophisticated equipment being included in the remote emissions sensing system.
    Type: Application
    Filed: May 20, 2013
    Publication date: September 26, 2013
    Applicant: Envirotest Systems Holdings Corp.
    Inventors: Robert Allen Gentala, Peter Miles McClintock, Donald Hugh Stedman
  • Patent number: 8447528
    Abstract: Water droplets in exhaust gas that is, or was, analyzed by a remote emissions sensing system are detected. The detection may be made using measurements generally captured by the remote emissions sensing system during typical operation. As such, the detection may be applied “on site” as remote emissions sensing analysis is ongoing, or may be applied post hoc from data previously acquired by a remote emissions sensing system. The detection may be implemented without requiring additional sensors, more sophisticated sensors, and/or other additional or more sophisticated equipment being included in the remote emissions sensing system.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: May 21, 2013
    Assignee: Envirotest Systems Holdings Corp.
    Inventors: Robert Allen Gentala, Peter Miles McClintock, Donald Hugh Stedman
  • Publication number: 20110153223
    Abstract: Water droplets in exhaust gas that is, or was, analyzed by a remote emissions sensing system are detected. The detection may be made using measurements generally captured by the remote emissions sensing system during typical operation. As such, the detection may be applied “on site” as remote emissions sensing analysis is ongoing, or may be applied post hoc from data previously acquired by a remote emissions sensing system. The detection may be implemented without requiring additional sensors, more sophisticated sensors, and/or other additional or more sophisticated equipment being included in the remote emissions sensing system.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Applicant: ENVIRONMENTAL SYSTEMS PRODUCTS HOLDINGS INC.
    Inventors: ROBERT ALLEN GENTALA, PETER MILES MCCLINTOCK, DONALD HUGH STEDMAN
  • Patent number: 6671630
    Abstract: A system and method of detecting gases in the exhaust of a moving vehicle with a small engine, such as a motorcycle or moped. The system employs a gas analyzer with a beam which makes more than two passes through a detection space. Through multiple passes through the detection space, the gas analyzer generates a signal indicative of the concentrations of one or more components of interest in the exhaust plume. The system also includes a processor for obtaining information about one or more vehicle exhaust components from the generated signal.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: December 30, 2003
    Assignee: Environmental Systems Products Holdings Inc.
    Inventors: Donald Hugh Stedman, Gary Bishop
  • Publication number: 20030204327
    Abstract: A system and method of detecting gases in the exhaust of a moving vehicle with a small engine, such as a motorcycle or moped. The system employs a gas analyzer with a beam which makes more than two passes through a detection space. Through multiple passes through the detection space, the gas analyzer generates a signal indicative of the concentrations of one or more components of interest in the exhaust plume. The system also includes a processor for obtaining information about one or more vehicle exhaust components from the generated signal.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 30, 2003
    Inventors: Donald Hugh Stedman, Gary Allen Bishop
  • Patent number: 6560545
    Abstract: A system and method of detecting gases in the exhaust of a moving vehicle with a small engine, such as a motorcycle or moped. The system employs a gas analyzer with a beam which makes more than two passes through a detection space. Through multiple passes through the detection space, the gas analyzer generates a signal indicative of the concentrations of one or more components of interest in the exhaust plume. The system also includes a processor for obtaining information about one or more vehicle exhaust components from the generated signal.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: May 6, 2003
    Assignee: Enviromental Systems Products, Inc.
    Inventors: Donald Hugh Stedman, Gary Allen Bishop
  • Publication number: 20020010554
    Abstract: A system and method of detecting gases in the exhaust of a moving vehicle with a small engine, such as a motorcycle or moped. The system employs a gas analyzer with a beam which makes more than two passes through a detection space. Through multiple passes through the detection space, the gas analyzer generates a signal indicative of the concentrations of one or more components of interest in the exhaust plume. The system also includes a processor for obtaining information about one or more vehicle exhaust components from the generated signal.
    Type: Application
    Filed: December 21, 2000
    Publication date: January 24, 2002
    Inventors: Donald Hugh Stedman, Gary Allen Bishop