Patents by Inventor Daniel W. Kestner

Daniel W. Kestner 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 stabilizing aqueous coal sludges
    Patent number: 4015997
    Abstract: The solids content of aqueous coal sludge slurries such as coal washings are stabilized in a hardened state by concentrating the solids content thereof, adding to the concentrated coal sludge 2-50% by weight of the solids of granulated blast furnace slag, with intimate mixing, and maintaining the mixture in a quiescent state and in the presence of excess water to produce a sedentary mass having load supportive properties suitable as landfill.
    Type: Grant
    Filed: July 22, 1975
    Date of Patent: April 5, 1977
    Assignee: Dravo Corporation
    Inventors: Joseph G. Selmeczi, Donald H. Marlin, Daniel W. Kestner