Patents by Inventor Alan M. Johnson

Alan M. Johnson 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).

  • Stabilizing solution for cells and tissues
    Patent number: 7749757
    Abstract: Methods and compositions for stabilizing tissues, cells, and cell components such that desired antigenic sites, light scatter properties and cellular morphology are preserved for a useful period of time. The stabilizing solution includes glycine, lysine and formaldehyde.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: July 6, 2010
    Assignee: Research & Diagnostic Systems, Inc.
    Inventors: Frank Mortari, Paige M Johnson, Alan M Johnson
  • Stabilizing solution for cells and tissues
    Patent number: 7267980
    Abstract: Methods and compositions for stabilizing tissues, cells, and cell components such that desired antigenic sites, light scatter properties and cellular morphology are preserved for a useful period of time. The stabilizing solution includes glycine, lysine and formaldehyde.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: September 11, 2007
    Assignee: Research & Diagnostic Systems, Inc.
    Inventors: Frank Mortari, Paige Marie Pulvermacher, Alan M. Johnson
  • Reticulocyte containing complete blood control
    Patent number: 6444471
    Abstract: A control composition, and method of preparing a control composition, that includes stabilized, maturation-arrested reticulocytes, and a complete blood count base including mature erythrocytes, stabilized white cells and stabilized platelets, or analogs thereof.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: September 3, 2002
    Assignee: Research & Diagnostic Systems, Inc.
    Inventor: Alan M. Johnson
  • Reticulocyte assay control
    Patent number: 5945340
    Abstract: A pre-determined concentration of stabilized, maturation-arrested porcine reticulocytes in a red blood cell base, useful as a reticulocyte control composition. The composition can be provided in the form of a concentrated reticulocyte composition, to be diluted to a desired final reticulocyte concentration at the time of use. The composition can also be provided in the form of a diluted, ready-to-use control composition. Also included is a method of preparing such a composition, the method involving sequential steps of forming and sedimenting Rouleaux bodies.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: August 31, 1999
    Assignee: Research & Diagnostics Systems, Inc.
    Inventors: Ralph T. Francis, Alan M. Johnson
  • Method for making a reticulocyte assay control
    Patent number: 5858789
    Abstract: A pre-determined concentration of stabilized, maturation-arrested porcine reticulocytes in a red blood cell base, useful as a reticulocyte control composition. The composition can be provided in the form of a concentrated reticulocyte composition, to be diluted to a desired final reticulocyte concentration at the time of use. The composition can also be provided in the form of a diluted, ready-to-use control composition. Also included is a method of preparing such a composition, the method involving sequential steps of forming and sedimenting Rouleaux bodies.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: January 12, 1999
    Assignee: Research & Diagnostic Systems, inc.
    Inventors: Ralph T. Francis, Alan M. Johnson
  • Reticulocyte assay control
    Patent number: 5736402
    Abstract: A pre-determined concentration of stabilized, maturation-arrested porcine reticulocytes in a red blood cell base, useful as a reticulocyte control composition. The composition can be provided in the form of a concentrated reticulocyte composition, to be diluted to a desired final reticulocyte concentration at the time of use. The composition can also be provided in the form of a diluted, ready-to-use control composition. Also included is a method of preparing such a composition, the method involving sequential steps of forming and sedimenting Rouleaux bodies.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: April 7, 1998
    Assignee: Research & Diagnostics Systems, Inc.
    Inventors: Ralph T. Francis, Alan M. Johnson
  • Cloning and expression of toxoplasma antigens and use of recombinant antigens
    Patent number: 5578453
    Abstract: A synthetic or recombinant polypeptide displaying the antigenicity of all or an antigenic fragment of the H4 or H11 polypeptides of Toxoplasma gondii, and recombinant DNA molecules, vectors and host cells for the expression thereof. Use of the polypeptide in vaccine compositions and in diagnostic immunoassays is also disclosed.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: November 26, 1996
    Assignee: The Flinders University of South Australia
    Inventors: Peter J. McDonald, Alan M. Johnson