Patents Assigned to Chem Spectra, Inc.
  • Variable fan for portable explosive or drug detection system
    Patent number: 9069999
    Abstract: Systems and methods are disclosed to automatically detect the presence of a substance on a test swipe by capturing a background image of the test swipe; applying one or more test chemicals to a test swipe; adjusting the temperature of the test swipe to a predetermined temperature range; controlling a variable speed fan to avoid fogging the camera's lens; capturing an in-situ image of the test swipe after the application of chemical at the predetermined temperature range; subtracting the background image from the in-situ image; generating a difference value from the two images; and searching a known database to identify the substance.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: June 30, 2015
    Assignee: CHEM SPECTRA, INC.
    Inventors: Jeffrey Haas, Douglas Haas
  • Method of analyzing a disposable test swipe
    Patent number: 8450115
    Abstract: A portable chemical analytical apparatus to analyze a test swipe includes a heater to warm the test swipe to a predetermined temperature; a clamp to secure the test swipe to the heater; one or more pumps to dispense one or more chemicals onto the test swipe from a disposable cartridge; a fan to remove chemical vapors rising a predetermined distance from the test swipe; and a camera to capture an image of the test swipe for automated analysis.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: May 28, 2013
    Assignee: Chem Spectra, Inc.
    Inventors: Jeffrey Haas, Douglas Haas
  • Portable explosive or drug detection system
    Patent number: 8304251
    Abstract: Systems and methods are disclosed to automatically detect the presence of a substance on a test swipe by capturing a background image of the test swipe; applying one or more test chemicals to a test swipe; adjusting the temperature of the test swipe to a predetermined temperature range; capturing an in-situ image of the test swipe after the application of chemical at the predetermined temperature range; subtracting the background image from the in-situ image; generating a difference value from the two images; and searching a known database to identify the substance.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: November 6, 2012
    Assignee: Chem Spectra, Inc.
    Inventors: Jeffrey Haas, Douglas Haas
  • Explosive or drug detection system for shipping containers
    Patent number: 8088332
    Abstract: A tester to detect the presence of a target substance includes a housing that can be mounted on a shipping container; a chemical reservoir insertable into the housing; a disc or an automated cartridge containing test filter swipes adapted to receive particles or vapor, and a chemical from the chemical reservoir, the test swipe including one or more chemically treated pads; a camera to capture an image from the test swipe; a processor coupled to the camera to process the image to detect the target substance; and a transmitter coupled to the processor to transmit a test result to a remote computer.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: January 3, 2012
    Assignee: Chem Spectra, Inc.
    Inventors: Jeffrey Haas, Doug Haas
  • Portable explosive or drug detection system
    Patent number: 8071385
    Abstract: A portable chemical analytical apparatus to analyze a test swipe includes a heater to warm the test swipe to a predetermined temperature; a clamp to secure the test swipe to the heater; one or more pumps to dispense one or more chemicals onto the test swipe from a disposable cartridge; a fan to remove chemical vapors rising a predetermined distance from the test swipe; and a camera to capture an image of the test swipe for automated analysis.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: December 6, 2011
    Assignee: Chem Spectra, Inc.
    Inventors: Jeffrey Haas, Douglas Haas