Patents by Inventor John Alden Kroetz

John Alden Kroetz 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).

  • Low temperature storage container
    Patent number: 3942668
    Abstract: An elongated container substantially round in cross section comprising a substantially round elongated hollow female member having a closed end, an open end, and a peripheral opening extending from the closed end to the open end, and a substantially round elongated hollow male member having a first end, a second end, a peripheral opening extending from one end to the other, and a plurality of fingers attached to and extending inward from the periphery of the first end, the male member being slidably and rotatably inserted into the female member with the second end of the male member adjacent to the closed end of the female member.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: March 9, 1976
    Assignee: W. R. Grace & Co.
    Inventors: Richard Francis Eberle, John Alden Kroetz