Patents by Inventor Jeffrey L. Narum

Jeffrey L. Narum 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 and apparatus for removing metal contamination from soil
    Patent number: 5607060
    Abstract: The invention is a process and an apparatus for removing metal contamination from soil. In the method, the soil is treated to produce soil with a small particle size. The particulate soil is then separated into a coarse fraction and a fine fraction. The coarse fraction and the fine fraction are contacted with a leach solution in separate contacting zones to remove the metal contamination from the soil, the metal is removed from the leach solution and the leach solution recycled to the leaching zones.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 4, 1997
    Assignee: Henkel Corporation
    Inventors: William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, Michael J. Virnig, John Fast
  • Method and apparatus for removing metal contamination from soil
    Patent number: 5466426
    Abstract: The invention is a process and an apparatus for removing metal contamination from soil. In the method, the soil is treated to produce soil with a small particle size. The particulate soil is then separated into a coarse fraction and a fine fraction. The coarse fraction and the fine fraction are contacted with a leach solution in separate contacting zones to remove the metal contamination from the soil, the metal is removed from the leach solution and the leach solution recycled to the leaching zones.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: November 14, 1995
    Assignee: Cognis, Inc.
    Inventors: William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, Michael J. Virnig, John Fast
  • Process for preparing 1-alkylimidazoles
    Patent number: 5011934
    Abstract: Imidazoles are alkylated at the 1-position by adding an alkyl halide a mixture comprising an imidazole, a non-reactive aromatic solvent and a base at temperature of from about 75.degree. C. to about 115.degree. C. and then maintaining the temperature for a period of time sufficient to produce the 1-alkylimidazole and then separating any inorganic material from the product.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: April 30, 1991
    Assignee: Henkel Research Corporation
    Inventors: Heinz-Guenther Schulte, Jeffrey L. Narum, Michael R. Johnson