Patents by Inventor Hans Berkenkamp

Hans Berkenkamp 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).

  • Process for the manufacture of brown coal briquettes
    Patent number: 3980447
    Abstract: A process of manufacturing briquettes from brown coal includes drying brown coal, which is preferably in fine granular form. The dried brown coal is then heated at a first rate up to a temperature in a range of from about 300.degree. to about 320.degree. C. The brown coal is subsequently heated at a second rate, which is less than the first rate, to a temperature in the range of from about 350.degree. to about 400.degree. C. The brown coal is thereafter pressed into briquettes.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: September 14, 1976
    Assignee: Rheinische Braunkohlenwerke AG
    Inventors: Friedrich Franke, Werner Wenzel, Mohamed Meraikib, Hans Berkenkamp