Patents by Inventor John G. Dunn

John G. Dunn 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).

  • Microwave apparatus for heating liquid in a closed plastic container
    Patent number: 4336435
    Abstract: The microwave heating apparatus consists of a microwave cavity, a energizing source, a mechanism for holding and agitating a load, and a temperature detector for continuously monitoring the temperature of the load. It is particularly useful for heating and quickly thawing frozen blood plasma or intravenous admixtures as needed. These must be thawed uniformly and to some preselected temperature so as not to destroy their effectiveness. It also helps to prevent wastage of the blood plasma thawed in anticipation of an emergency.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: June 22, 1982
    Assignee: Canadian Patents & Dev. Limited
    Inventors: Satish Kashyap, John G. Dunn, Lorne Woods, Frank Vachon
  • Microwave leakage indicator strip
    Patent number: 4065655
    Abstract: A microwave leakage indicator for ovens in the form of a strip of encapsulated liquid crystal film backed by a layer of microwave absorbing material mounted around the edge of the door and overlapping the slot between door and oven where leakage might occur. The characteristics of the liquid crystal material are chosen such that if leakage above a preset level does occur at any location around the edge of the door, the absorbing material generates heat resulting in a quickly noticeable colour change in the liquid crystal film.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 27, 1977
    Assignee: Canadian Patents and Development Limited
    Inventors: James Y. Wong, Satish C. Kashyap, John G. Dunn