Patents by Inventor Siegfried Henkel

Siegfried Henkel 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 of manufacturing green hot briquettes from fine coal for use in shaft furnaces
    Patent number: 4159905
    Abstract: A method of manufacturing a briquetted coke from fine coal comprises carbonizing the coal at a temperature of from around 600.degree. to 900.degree. C., mixing the carbonized coal with approximately 10 to 80% and preferably from 20 to 40% of fine coal well caking coal, and thereafter hot briquetting the mixture at temperatures of from around 300.degree. to 500.degree. C. A fuel for shaft furnaces preferably includes the use of the hot briquettes as the only solid fuel in the shaft furnace, and it is particularly applicable for blast furnaces.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: July 3, 1979
    Assignees: Bergwerksverband GmbH, Rheinstahl Huttenwerke AG
    Inventors: Werner Peters, Josef Langhoff, Siegfried Henkel, Klaus D. Haverkamp