Patents by Inventor Hans Limp

Hans Limp 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).

  • Liquefied gas leakage calibration source
    Patent number: 4172378
    Abstract: A calibrated gas source for testing leakage indicators composed of a housing divided into two chambers by a partition having a gas passage between the chambers, a mass of liquefied gas filling one of the chambers, a valve associated with the passage for permitting gas to pass from the one chamber to the other chamber when it is under a certain excess pressure, and a capillary passage between the other chamber and the surrounding environment.
    Type: Grant
    Filed: January 10, 1978
    Date of Patent: October 30, 1979
    Assignee: Leybold-Heraeus GmbH & Co. KG
    Inventor: Hans Limp