Patents by Inventor Richard C. Spung

Richard C. Spung 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 removing heavy metals from aqueous solutions
    Patent number: 5348662
    Abstract: In the process of removing heavy metals from aqueous solutions (groundwater) by precipitation of a salt thereof, an oxidizing agent is optionally used to increase the valence of said metal, and a precipitation-enhancing agent is added to maximize particle size of the precipitate and to facilitate its separation from said solution.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: September 20, 1994
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jeffrey H. Yen, Richard C. Spung