Patents by Inventor Jan R. Selman

Jan R. Selman 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: 5571489
    Abstract: A process for recovery of chromium in an aqueous solution comprising converting the chromium to chromyl chloride, separating the chromyl chloride from the aqueous solution, either as a heavy underlayer, or by extraction into a solvent, purifying the chromyl chloride, hydrolyzing the purified chromyl chloride to form a solution, and drying or precipitating the solution to form chromium, either as chromic acid or a chromate salt.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: November 5, 1996
    Assignee: Illinois Institute of Technology
    Inventors: Thomas M. Holsen, Jan R. Selman, Subbarao L. Guddati