Patents by Inventor Michael P. Challen

Michael P. Challen 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).

  • Mushroom mutant strains
    Patent number: 4608775
    Abstract: Sensitivity (lack of resistance) to fungicides is a problem in commercial strains of the mushroom Agaricus bisporus. Mutant strains, produced from the known parent strains by UV irradiation followed by selection, and having a genetically stable phenotype of insensitivity (resistance) to carboxin or benodanil have now been prepared. These mutant strains give a good yield of fruit in the presence of the fungicide. They have been deposited as patent deposits under the Budapest Treaty at the Commonwealth Mycological Institute.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: September 2, 1986
    Assignee: National Research Development Corporation
    Inventors: Timothy J. Elliott, Michael P. Challen