Patents by Inventor Shing F. Kwan

Shing F. Kwan 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).

  • Method for stabilizing analyte structure using antibodies or antibody fragments thereof
    Patent number: 6143537
    Abstract: A method for stabilizing analyses with antibodies and antibody fragments comprises dissolving the analyte in a liquid to form a solution, adding analyte-specific antibodies, fragments of such antibodies, or both to the solution, heating the solution, and then cooling and filtering the solution. The filtered solution may be diluted in a suitable matrix.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: November 7, 2000
    Assignee: Medical Analysis Systems, Inc.
    Inventors: Shing F. Kwan, Ivan E. Modrovich, Rebecca J. Hunt
  • Fructosmaine reagent and calibrator system
    Patent number: 5556788
    Abstract: A system for determining the concentration of fructosamine in sera which consists of a first reagent in which a tetrazolium salt which reduces all reactive substances in sera including fructosamine and a second reagent which is responsive to all reactive substance in sera other than fructosamine. The difference in color change as between the two allows the determination of concentration of fructosamine.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: September 17, 1996
    Assignee: Medical Analysis Systems, Inc.
    Inventors: Shing F. Kwan, Marjorie Bravo-Leerabhandh
  • Stable, single-liquid alpha-amylase reagent
    Patent number: 5384245
    Abstract: In a single liquid alpha-amylase reagent composition comprising an aqueous solution of at least one substrate which is hydrolyzed when mixed with a sample of body fluid containing alpha-amylase to yield a detectable label, alpha-glucosidase from Bacillus stearothermophilus is used to cooperate with the alpha-amylase in the formation of the detectable label and the composition being stable against degradation for a least 6 months at 2.degree. to 10.degree. C.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: January 24, 1995
    Assignee: Ivan E. Modrovich
    Inventor: Shing F. Kwan
  • Lipase single reagent system
    Patent number: 5378609
    Abstract: A single system reagent for the determination of lipase, formulated as an emulsion comprising a lipase-active fatty acid source; a first lipase activator comprising colipase; a second lipase activator; a lipoprotein lipase inhibitor; an emulsion stabilizer comprising Triton X100; a buffer; and an antiprecipitant.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: January 3, 1995
    Assignee: Ivan E. Modrovich
    Inventors: Shing F. Kwan, Rebecca J. Hunt
  • Fructosamine reagent and calibrator system
    Patent number: 5312760
    Abstract: A system for determining the concentration of fructosamine in sera which consists of a first reagent in which a tetrazolium salt which reduces all reactive substances in sera including fructosamine and a second reagent which is responsive to all reactive substance in sera other than fructosamine. The difference in color change as between the two allows the determination of concentration of fructosamine.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: May 17, 1994
    Assignee: Modrovich, Ivan Endre
    Inventors: Shing F. Kwan, Marjorie Bravo-Leerabhandh
  • Lipase single reagent system
    Patent number: 5248598
    Abstract: A single system reagent for the determination of lipase, formulated as an emulsion comprising a lipase-active fatty acid source; a first lipase activator comprising colipase; a second lipase activator; a lipoprotein lipase inhibitor; a first emulsion stabilizer comprising Triton X100; a second emulsion stabilizer; a buffer; and an anti-precipitant.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: September 28, 1993
    Assignee: Ivan E. Modrovich
    Inventors: Shing F. Kwan, Rebecca J. Hunt