Patents by Inventor Donald R. Lueking

Donald R. Lueking 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).

  • Apparatus and method for the generation and use of ferric ions
    Patent number: 6043022
    Abstract: An apparatus and method for the generation and use of ferric ions produced by acidophilic, chemoautotrophic bacteria.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: March 28, 2000
    Assignee: Board of Control of Michigan Technological University
    Inventors: Donald R. Lueking, Carl C. Nesbitt
  • Method for the generation and use of ferric ions
    Patent number: 5827701
    Abstract: A process for generating a ferric ion solution. The process includes the steps of establishing in a vessel a population of acidophilic, chemoautotrophic bacteria which oxidize ferrous ions into ferric ions; supplying the bacteria with a feed solution of ferrous ions; maintaining the pH of the contents of the vessel below 3.0; and withdrawing the generated ferric ion solution from the vessel. The generated ferric ion solution can be used to oxidize metal or ore and to solubilize metal from ore, alloys or scrap. The ferrous ions produced during the oxidation or solubilization are recirculated into the feed solution to continue the process of generating ferric ions.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: October 27, 1998
    Inventors: Donald R. Lueking, Carl C. Nesbitt