Patents by Inventor Dwight W. Altizer

Dwight W. Altizer 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).

  • Patent number: 4325819
    Abstract: An apparatus and method for washing and recovering raw coal with no more than about 5% moisture and coal fines down to 200 mesh is disclosed. A complete washing plant having the ability to wash raw contaminated coal is disclosed. However, this invention is directed toward methods and apparatus for processing the coal slurry or effluent, and the wet coal obtained from a coal washing plant which methods and apparatus recovers coal fines down to 28 mesh. The apparatus and method of this invention separates the slurry which includes coal fines and contaminant material below 28 mesh by various screening and centrifugal processes such that coal fines down to 200 mesh are recovered. In addition, the methods and apparatus include various screens and centrifugal dryers for drying the wet coal thus recovering even more coal fines and reducing the moisture. The method and apparatus processes the effluents which include water and the contaminant materials such that the contaminant solids are removed from the water.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: April 20, 1982
    Inventor: Dwight W. Altizer