Patents by Inventor Mary J. Freeman

Mary J. Freeman 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, kit and apparatus for verifying calibration and linearity of vertical photometers
    Patent number: 5258308
    Abstract: A method and apparatus for calibrating or checking the calibration of vertical photometers. The invention may also provide easy and convenient assay results for diagnostic profiles. The invention comprises pre-dispensed amounts of a suitable reagent, chosen for the particular use, disposed in a vessel with an amount of a wetting agent or other means to yield a reproducible meniscus in the resulting control solution. The control solution is dried to leave a precise amount of dried reagent and other constituents in the vessel which can then be stored and distributed until subsequent use. The dried control solution can then be reconstituted to provide a standard having known absorbance and physical characteristics.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: November 2, 1993
    Inventors: Mary J. Freeman, Gary M. Freeman
  • Method of making calibration solution for verifying calibration and linearity of vertical photometers
    Patent number: 5183761
    Abstract: A method and device for calibrating or checking the calibration of vertical photometers. The invention may also provide easy and convenient assay results for diagnostic profiles. The invention comprises pre-dispensed amounts of a suitable reagent, chosen for the particular use, disposed in a vessel with an amount of a wetting agent to yield a reproducible meniscus in the resulting control solution. The control solution is dried to leave a precise amount of dried reagent and other constituents in the vessel which can then be stored and distributed until subsequent use. The dried control solution can then be reconstituted to provide a standard having known absorbance and physical characteristics.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: February 2, 1993
    Inventors: Mary J. Freeman, Gary M. Freeman