Patents by Inventor John B. Pring

John B. Pring 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).

  • Container for transport of frozen materials such as biological samples
    Patent number: 4974423
    Abstract: A portable container for the transport of frozen samples, for example biological samples. The container has two compartments, one to contain the sample and the other to contain a portable refrigerant such as dry ice. Readouts are included to check for when the dry ice needs replenishment, and also to check on whether the container has at any time risen to a dangerous temperature, e.g. -5.degree. C.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: December 4, 1990
    Inventor: John B. Pring