Patents by Inventor Johann Ludwig Hemmerrich

Johann Ludwig Hemmerrich 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).

  • Evaporative transpiration pump having a heater and a pouous body
    Patent number: 5729984
    Abstract: The present invention relates to an evaporative transpiration pump having an inlet for liquids, an outlet for gases, a porous body disposed between the inlet and the outlet. A heating means is disposed at the outlet side of the porous body. The thermal conductivity of the porous body is no greater than 5 Wm.sup.-1 K.sup.-1 and is preferably no greater than 1 Wm.sup.-1 K.sup.-1. The pump is particularly suitable for use in multi-column cryodistillation apparatus.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: March 24, 1998
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Johann Ludwig Hemmerrich, Paul Milverton