Patents by Inventor Lloyd Robert Nelson

Lloyd Robert Nelson 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).

  • Upgrading of precious metals concentrates and residues
    Patent number: 9194022
    Abstract: A process for upgrading a precious metals-containing concentrate or residue results in near-quantitave removal of base metals and several impurity elements at elevated temperatures. The precious metals-containing concentrate or residue is exposed to oxygen or an oxygen-containing environment in an oxidative pre-treatment step followed by treatment with a hydrochlorinating agent in a hydrochlorination step to form an upgraded concentrate or residue.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: November 24, 2015
    Assignee: Rustenburg Platinum Mines Limited
    Inventors: Alain Roy, Boyd R. Davis, Leslie James Bryson, Lloyd Robert Nelson, Stephen Farring Woollam, Victor Loyiso Vusumzi Mtotywa
  • UPGRADING OF PRECIOUS METALS CONCENTRATES AND RESIDUES
    Publication number: 20130177487
    Abstract: A process for upgrading a precious metals-containing concentrate or residue results in near-quantitave removal of base metals and several impurity elements at elevated temperatures. The precious metals-containing concentrate or residue is exposed to oxygen or an oxygen-containing environment in an oxidative pre-treatment step followed by treatment with a hydrochlorinating agent in a hydrochlorination step to form an upgraded concentrate or residue.
    Type: Application
    Filed: June 17, 2011
    Publication date: July 11, 2013
    Applicant: ANGLO PLATINUM MANAGEMENT SERVICES (PROPRIETARY) LIMITED
    Inventors: Alain Roy, Boyd R. Davis, Leslie James Bryson, Lloyd Robert Nelson, Stephen Farring Woollam, Victor Loyiso Vusumzi Mtotywa