Patents by Inventor Christopher William Hand

Christopher William Hand 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: 8025849
    Abstract: An oral fluid collection and transfer device comprises a collection device (10) and a test cartridge (100). The collection device includes a frame or chassis (14), and an absorbing pad (12) for absorbing oral fluid and which is secured around part of the frame with part of the frame protruding from the pad. A collapsible cover (16) covers the absorbing means and has apertures (68) for the ingress of oral fluid into contact with the absorbing pad. A cap (18) covers the part of the frame protruding from the absorbing pad. The cap and the cover latch together to surround the frame and the absorbing pad. The device also includes a fluid adequacy indicator (20) in the form of an electrical circuit with an LED (66) which is completed when the absorbing means has absorbed a predetermined volume of oral fluid.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: September 27, 2011
    Assignee: Cozart Bioscience
    Inventors: Dene Baldwin, Ahmed Jehanli, Christopher William Hand
  • Patent number: 7803633
    Abstract: A screening device for performing an immunoassay test to detect the presence of a compound in a body fluid. The device includes a holder for removably receiving a membrane to which the fluid has been applied. Light is directed to the membrane. A photodetector measures the concentration of the light reflected back from the membrane. Specifically, the concentrations of reflected light from a control zone and a test zone are measured. Signals representative of the measured light concentrations are applied to a processor. If a specified concentration of predetermined light from a control zone on the membrane is detected, the processor considers the test to be successful. In the test is successful, the processor, based upon the measured concentration of reflected light from the test zone, generates data representative of the presence of the compound.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: September 28, 2010
    Assignee: Cozart Bioscience Limited
    Inventors: Robin James Spivey, Christopher William Hand, Dene Baldwin, Osborn Pierce Jones
  • Patent number: 7790400
    Abstract: The invention provides competitive immunoassay techniques for high sensitivity detection of delta-9-tetrahydro-cannabinol (cannabis; THC) employing a carrier conjugate of an intermediate in the biosynthesis of cannabis, more particularly 5-pentylresorcinol conjugated to a macromolecular carrier via its hydroxyl groups. By employing such a conjugate with anti-THC antibody in a lateral flow immunochromatography test device convenient on-site testing for low levels of cannabis in liquid samples may be achieved. Such testing is particularly favoured for roadside testing for cannabis in oral fluid samples.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: September 7, 2010
    Assignee: Concateno UK Limited
    Inventors: Ahmed Mohammed Taki Jehanli, Christopher William Hand
  • Publication number: 20090017555
    Abstract: The invention provides competitive immunoassay techniques for high sensitivity detection of delta-9-tetrahydro-cannabinol (cannabis; THC) employing a carrier conjugate of an intermediate in the biosynthesis of cannabis, more particularly 5-pentylresorcinol conjugated to a macromolecular carrier via its hydroxyl groups. By employing such a conjugate with anti-THC antibody in a lateral flow immunochromatography test device convenient on-site testing for low levels of cannabis in liquid samples may be achieved. Such testing is particularly favoured for roadside testing for cannabis in oral fluid samples.
    Type: Application
    Filed: July 1, 2005
    Publication date: January 15, 2009
    Applicant: Cozart Bioscience Limited
    Inventors: Ahmed Mohammed Taki Jehanli, Christopher William Hand
  • Publication number: 20080287316
    Abstract: A screening device for performing an immunoassay test to detect the presence of a compound in a body fluid. The device includes a holder for removably receiving a membrane to which the fluid has been applied. A light is directed to the membrane. A photodetector measures the concentration of the light reflected back from the membrane. Specifically, the concentrations of reflected light from a control zone and a test zone are measured. Signals representative of the measured light concentrations are applied to a processor. If a specified concentration of predetermined light from a control zone on the membrane is detected, the processor considers the test to be successful. In the test is successful, the processor, based upon the measured concentration of reflected light from the test zone, generates data representative of the presence of the compound.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 20, 2008
    Inventors: Robin James Spivey, Christopher William Hand, Dene Baldwin, Osborn Pierce Jones
  • Patent number: 7070920
    Abstract: A screening device for performing an immunoassay test to detect the presence of a compound in a body fluid. The device includes a holder for removably receiving a membrane to which the fluid has been applied. A light is directed to the membrane. A photodetector measures the concentration of the light reflected back from the membrane. Specifically, the concentrations of reflected light from a control zone and a test zone are measured. Signals representative of the measured light concentrations are applied to a processor. If a specified concentration of predetermined light from a control zone on the membrane is detected, the processor considers the test to be successful. In the test is successful, the processor, based upon the measured concentration of reflected light from the test zone, generates data representative of the presence of the compound.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: July 4, 2006
    Assignee: Cozart Bioscience Limited
    Inventors: Robin James Spivey, Christopher William Hand, Dene Baldwin, Osborn Pierce Jones
  • Publication number: 20040082878
    Abstract: An oral fluid collection and transfer device comprises a collection device (10) and a test cartridge (100). The collection device includes a frame or chassis (14), and an absorbing pad (12) for absorbing oral fluid and which is secured around part of the frame with part of the frame protruding from the pad. A collapsible cover (16) covers the absorbing means and has apertures (68) for the ingress of oral fluid into contact with the absorbing pad. A cap (18) covers the part of the frame protruding from the absorbing pad. The cap and the cover latch together to surround the frame and the absorbing pad. The device also includes a fluid adequacy indicator (20) in the form of an electrical circuit with an LED (66) which is completed when the absorbing means has absorbed a predetermined volume of oral fluid. The test cartridge (100) has a collection chamber (110) to allow insertion of the collection device into the test cartridge. A test strip (150) is used to for test the oral fluid for the presence of analytes.
    Type: Application
    Filed: August 7, 2003
    Publication date: April 29, 2004
    Inventors: Dene Baldwin, Ahmed Jehanli, Christopher William Hand
  • Publication number: 20010034068
    Abstract: Immunoassay tests or agglutination tests run on samples of bodily fluid to detect the presence of particular compounds such as drugs in the body may be screened in the screening device. A test membrane is inserted into the screening device and illuminated. The reflected image is detected and the digitized data processed. For immunoassay tests, the digitized data is segmented and data for the test region is compared to that from the control region and the background regions to determine whether the test data exhibits any significant results. For agglutination tests, the digitized data is processed to determine the number and size of the areas of coagulation to determine whether the test data exhibits any significant results.
    Type: Application
    Filed: January 12, 2001
    Publication date: October 25, 2001
    Inventors: Robin James Spivey, Christopher William Hand, Dene Baldwin, Osborn Pierce Jones