Patents by Inventor Michael Stetter

Michael Stetter 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).

  • Method and apparatus for detecting leaks in a container
    Patent number: 5917193
    Abstract: The invention concerns a method and device for checking tightness of containers, housings and similar test objects (15). The test object (15) is subjected to a pressurized test gas. If a leak (28) is present, test gas escapes from the text object (15) and is exposed in a test chamber (18) to an intensity-modulated electromagnetic wave field emitted by a laser (1). The wave field contains frequency components which are absorbed by the test gas to produce a photo-acoustic signal indicative of the presence of a leak.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: June 29, 1999
    Inventors: Gerhart Schroff, Michael Stetter