Patents by Inventor Ferdinand Hirth

Ferdinand Hirth 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 strippable substances in liquids
    Patent number: 5324938
    Abstract: For the continuous quantitative determination of volatile substances in lids, such as in particular halogenated hydrocarbons in process or waste waters, the invention proposes a corresponding method, according to which the liquid is led past a liquid-impermeable, but gas-permeable membrane and that the strippable substances in the liquid in their gas phase pass through the membrane and lead same through a measuring cell. An apparatus for performing the method is characterized by a flow chamber provided with a liquid-impermeable, but gas-permeable membrane for the liquids to be investigated and by a measuring cell for the substances to be investigated located on the membrane side remote from the flow chamber.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: June 28, 1994
    Assignee: Fraunhofer- Gesellschft zur Forderung der angwandten Forschung e. V.
    Inventors: Gunther Hambitzer, Wolfgang Lutter, Martin Joos, Ferdinand Hirth