Patents by Inventor Nicholas L. Labao

Nicholas L. Labao 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).

  • Lithium metatungstate
    Patent number: 5328035
    Abstract: A process is provided for separating minerals from a mixture of minerals having different densities. The minerals are provided in the comminuted state to liberate the minerals one from the other, following which the minerals are slurried in an aqueous solution of lithium metatungstate selected to provide a density between the densities of the minerals to be separated, whereby the minerals having a density greater than that of the solution will sink and the minerals having a density less than that of the solution will float.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: July 12, 1994
    Assignee: BHP Minerals International Inc.
    Inventors: Willem P. C. Duyvesteyn, Houyuan Liu, Nicholas L. Labao, Purusotam L. Shrestha
  • Lithium metatungstate
    Patent number: 5178848
    Abstract: Lithium metatungstate as a new composition of matter and the production thereof are disclosed. A solution of lithium monotungstate is treated with an extractant to remove sufficient lithium ions to produce a dilute solution of lithium metatungstate and the dilute solution is then concentrated. Lithium metatungstate solutions are more dense than other alkali metal metatungstates and have lower viscosities which properties make the solutions highly useful for heavy media separations.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: January 12, 1993
    Assignee: BHP-Utah International Corp.
    Inventors: Willem P. C. Duyvesteyn, Houyuan Liu, Nicholas L. Labao, Purusotam L. Shrestha