Patents by Inventor Wilhelm Grassmann

Wilhelm Grassmann 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 and apparatus for the cooling of white cement clinker
    Patent number: 4461645
    Abstract: A method of and an apparatus for cooling white cement clinker from a rotary kiln wherein the clinker is classified into at least two and preferably more particle-size fractions which are quenched with water with residence times staggered so as to increase as the particle size range increases. The cooling is effected to a temperature of below 1200.degree. C. but without excessively cooling the clinker so that all fractions retain sufficient sensible heat to drive off water picked up during the quenching process and resulting in completely dry clinker.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: July 24, 1984
    Assignee: BKMI Industrieanlagen GmbH
    Inventors: Gunter Roth, Wolfram Quittkat, Dieter Frank, Ludwig Muller, Wilhelm Grassmann