Patents by Inventor Dietmar C. Naunapper

Dietmar C. Naunapper 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 drying a solid material wetted with a solvent or solvent mixture
    Patent number: 4621437
    Abstract: The invention relates to a method of drying a solid wetted with a solvent or solvent mixture by causing superheated vapour of the solvent or solvent mixture as a carrier medium to flow through the material to be dried in an evaporation room, the solvent or solvent mixture evaporating and being carried along with the carrier medium, and by then causing the evaporated solvent or solvent mixture to condense from the carrier medium, if desired after compression thereof, in a cooling device. During this drying process a sub-ambient pressure is provided in the evaporation room and the temperature in the evaporation room is controlled by adjusting the sub-ambient pressure, if desired, in combination with an additional temperature controlling means. The inventiona also relates to a device for using the above method.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: November 11, 1986
    Assignees: Duphar International Research B.V., Glatt GmbH
    Inventors: Robert Grande, Cornelis J. de Kluizenaar, Dietmar C. Naunapper, Karlheinz J. Wehrle