Patents by Inventor Justin Raskauskas

Justin Raskauskas 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 reducing the concentration of dissolved metals and metalloids in an aqueous solution
    Patent number: 6177015
    Abstract: An aqueous solution, for example, effluent from an off-gas scrubber, is treated to remove metal and metalloid ions by in situ precipitation of ferrous ions by the addition thereto of a ferrous ion-containing solution, salt or other such ferrous ion-containing source and a hydroxyl-yielding base in the presence of the metals and metalloids. The reaction conditions include a temperature of at least about 60° C., and a pH of from about 6 to about 10.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: January 23, 2001
    Assignee: Inco Limited
    Inventors: Brian Charles Blakey, Justin Raskauskas
  • Removal of arsenic from iron arsenic and sulfur dioxide containing solutions
    Patent number: 5820966
    Abstract: The process provides a method of removing arsenic from solutions containing sulfur dioxide in an environmentally acceptable manner. This process first oxidizes arsenic, iron and sulfur dioxide contained in an aqueous solution to prepare the solution for precipitation and to improve process control. Recycled neutralized precipitate seeds the oxidized aqueous solution. A calcium-containing base precipitates products of neutralization on the seeds. The final neutralized precipitate contains a stable ferric arsenate compounds.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: October 13, 1998
    Assignee: Inco Limited
    Inventors: Eberhard Krause, Yoshiaki Okita, Reichel Abelis Tenbergen, Brian Charles Blakely, Justin Raskauskas