Patents by Inventor Hans M. Ringelstein

Hans M. Ringelstein 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).

  • Safety insert for storage vessels of low-boiling liquified gases
    Patent number: 4187956
    Abstract: A safety insert for storage vessels of low-boiling liquified gases includes a safety neck tube placed within the neck forming an annular space with respect thereto, the neck having a blind flange with a fill and extraction hole for the gas as well as a safety valve and vent pipe with a stopcock mounted onto the neck and with a gas outlet hole in the safety neck tube.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: February 12, 1980
    Assignee: Messer Griesheim GmbH
    Inventors: Rolf Schrawer, Werner K. Diehl, Hans M. Ringelstein