Patents by Inventor Jorg Kahler

Jorg Kahler 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 the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate
    Patent number: 5846501
    Abstract: In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are dissolved in a mixture of nitric acid and hydrogen peroxide without nitrogen oxides arising, and, by evaporation and cooling, potassium nitrate, sodium chloride, and sodium nitrate are obtained sequentially by fractional crystallization.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: December 8, 1998
    Assignee: Durferrit GmbH Thermotechnik
    Inventors: Matthias Kremer, Georg Wahl, Eberhard Gock, Stefan Wigger, Jorg Kahler
  • Process for recovering the salt constituents from hardening-shop salt baths
    Patent number: 5769906
    Abstract: The process for environmentally acceptable and economical recovery of chloride salts from hardening-shop used salts utilizing the steps of leaching of the used salt, detoxification of the cyanide and selective crystallization of the individual chloride salts. The process is characterized in that all the chloride salts that are present in the hardening-shop used salt are recovered in pure form.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: June 23, 1998
    Assignee: Durferrit GmbH Thermotechnik
    Inventors: Mattias Kremer, Georg Wahl, Eberhard Gock, Stefan Wigger, Jorg Kahler