Patents by Inventor David Theodore Sutherland

David Theodore Sutherland 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).

  • Portable refrigerating unit for freeze drying apparatus
    Patent number: 3950963
    Abstract: A portable refrigerating unit has a condenser coil which may be inserted directly into the drying chamber of a freeze drying apparatus. A flexible tube is utilized to convey refrigerant to and from the condenser coil. The flexible tube and the condenser coil are connected through a closure member, which provides a vacuum tight seal for the drying chamber of the freeze drying apparatus. The closure member may be removed from the condenser coil, so that various closure sizes may be utilized and so that the condenser coil may be utilized as an immersible refrigerating device.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: April 20, 1976
    Assignee: The Virtis Company
    Inventor: David Theodore Sutherland