Patents by Inventor Ruth M. Johnson

Ruth 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).

  • Fluorometric assay of allergic reactions
    Patent number: 4845027
    Abstract: A method for identifying and quantifying allergen specific IgE levels in patient serum by conjugating the serum IgE with allergens on an insoluble support, conjugating the serum IgE with an enzyme labeled anti-IgE antibody, contacting the enzyme with a solution of a substrate which will yield a fluorescent product in the presence of the enzyme, and measuring the level of fluoresence in the solution.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: July 4, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Emanuel Calenoff, Ruth M. Johnson, Yuh-Geng Tsay, John Scott
  • Oven rack moving tool
    Patent number: D264037
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: April 27, 1982
    Inventor: Ruth M. Johnson