Patents by Inventor Leonard Berkowitz

Leonard Berkowitz 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).

  • Sewage sludge dewatering
    Patent number: 4196077
    Abstract: Substantial dewatering of a secondary sewage sludge stream is obtained by admixing same with various hydrocarbon oils, the initial sludge/oil weight ratio being maintained in an amount less than 0.6, at shear rates of at least 130 seconds.sup.-1, and allowing the mixture thus formed to settle at temperatures of at least 72.degree. F. Substantially complete disposal of the solids thus removed from the secondary sludge stream can be achieved by subjecting same to evaporation and incineration processes.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: April 1, 1980
    Assignee: Exxon Research & Engineering Co.
    Inventors: Leonard Berkowitz, Jerome Geyer, Alan Beerbower, William J. Asher