Patents by Inventor Cornelis VERBAAN

Cornelis VERBAAN 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).

  • Acid leaching of rare earth minerals
    Patent number: 10273562
    Abstract: The invention provides hydrometallurgical processes for the recovery of rare earth values from ore, using simple crushing without beneficiation to produce an enriched and purified mixed rare earth concentrate. Ore is crushed to a relatively coarse particle size, and then treated with relatively small amounts of acid, at a relatively modest elevated temperature, to render the rare earth elements extractable in a subsequent water leach.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: April 30, 2019
    Assignee: Search Minerals Inc.
    Inventors: David Dreisinger, Cornelis Verbaan
  • ACID LEACHING OF RARE EARTH MINERALS
    Publication number: 20170204499
    Abstract: The invention provides hydrometallurgical processes for the recovery of rare earth values from ore, using simple crushing without beneficiation to produce an enriched and purified mixed rare earth concentrate. Ore is crushed to a relatively coarse particle size, and then treated with relatively small amounts of acid, at a relatively modest elevated temperature, to render the rare earth elements extractable in a subsequent water leach.
    Type: Application
    Filed: June 30, 2015
    Publication date: July 20, 2017
    Inventors: David Dreisinger, Cornelis Verbaan
  • Method for recovering indium, silver, gold and rare, precious and base metals from complex oxide and sulfide ores
    Patent number: 8585991
    Abstract: The present invention relates to methods for recovering precious metals including silver and gold, rare metals including indium and gallium, base metals including copper, lead and zinc or a combination of precious, rare and base metals from complex oxide ores, sulfide ores or oxide and sulphide ores using an acid chloride oxidizing leach.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: November 19, 2013
    Assignee: South American Silver Corp.
    Inventors: David Dreisinger, Ralph Fitch, Cornelis Verbaan
  • METHOD FOR RECOVERING INDIUM, SILVER, GOLD AND RARE, PRECIOUS AND BASE METALS FROM COMPLEX OXIDE AND SULFIDE ORES
    Publication number: 20120328494
    Abstract: The present invention relates to methods for recovering precious metals including silver and gold, rare metals including indium and gallium, base metals including copper, lead and zinc or a combination of precious, rare and base metals from complex oxide ores, sulfide ores or oxide and sulphide ores using an acid chloride oxidizing leach.
    Type: Application
    Filed: May 2, 2012
    Publication date: December 27, 2012
    Inventors: David DREISINGER, Ralph FITCH, Cornelis VERBAAN