Patents by Inventor Thomas D. Johnstone

Thomas D. Johnstone 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).

  • Sink sprayer attachment apparatus
    Patent number: 8342768
    Abstract: The sink sprayer attachment apparatus is for attachment to an existing hose such as that typically associated with a sink. The spray head fitting is installed on the spray head. Spray head fittings are provided with male and female threads and other forms of attachment to spray heads. The apparatus negates the need for total hose replacement, a feature that saves considerable expense and installation time and effort. The apparatus importantly provides for component disposability, and therefore ideally employs plasticized components and other inexpensive materials.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: January 1, 2013
    Inventors: Thomas D. Johnston, Glenda Johnston
  • Synergistic microbicides containing ionene polymers and borates for the control of fungi on surfaces
    Patent number: 5087457
    Abstract: A mixture of an ionene polymer and a borate that is useful for the control of fungi. This microbicidal mixture is especially effective on the surfaces of wood, leather, plastics, paint, paper and paperboard, and textiles.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: February 11, 1992
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Stephan D. Bryant, John Packer, Thomas D. Johnstone