Patents by Inventor Lutz Hoffmann

Lutz Hoffmann 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 for removing radioactive plastic wastes and apparatus therefor
    Patent number: 4204974
    Abstract: Method and apparatus for encapsulating radioactive plastic wastes, particularly radioactively contaminated ion exchange filter material containing water, in bituminous solidification substances, by drying the radioactive waste separate and apart from the bituminous substance, introducing regulated amounts of dry radioactive waste into the bituminous substance and kneading the mixture at a temperature of 120.degree. C. or lower to encapsulate the dry radioactive waste by the mechanical action of the kneading, and pouring the kneaded, encapsulated radioactive plastic waste into a container. Undesired decomposition with discharge of pollutants into the atmosphere are avoided.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: May 27, 1980
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Anwer Puthawala, Lutz Hoffmann, Hermann Emmert, Werner Hild, Hans-Erich John, Wolfgang Kluger