Patents by Inventor John Andrew Lawson

John Andrew Lawson 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).

  • Sulfate process
    Patent number: 8728437
    Abstract: A sulfate process for producing titania from a titaniferous material (as herein defined) including a step of leaching said titaniferous material with a leachant to form a process solution that includes an acidic solution of titanyl sulfate and iron sulfate, wherein said sulfate process further includes a filtration step comprising filtering said leachant to at least substantially remove titanyl sulfate particles from said leachant prior to supplying said leachant to said leach step.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: May 20, 2014
    Assignee: BHP Billiton Innovation Pty Ltd
    Inventors: Alan David Stuart, John Andrew Lawson, Christopher Brett Ward, Hong Peng
  • Sulfate Process
    Publication number: 20110229386
    Abstract: A sulfate process for producing titania from a titaniferous material (as herein defined) including a step of leaching said titaniferous material with a leachant to form a process solution that includes an acidic solution of titanyl sulfate and iron sulfate, wherein said sulfate process further includes a filtration step comprising filtering said leachant to at least substantially remove titanyl sulfate particles from said leachant prior to supplying said leachant to said leach step.
    Type: Application
    Filed: September 29, 2009
    Publication date: September 22, 2011
    Inventors: Alan David Stuart, John Andrew Lawson, Christopher Breff Ward, Hong Peng
  • Metal Extraction
    Publication number: 20080124259
    Abstract: A sulfate process for producing titania from a titaniferous material as disclosed. The process is characterized by a particular leach step for leaching titaniferous material.
    Type: Application
    Filed: October 8, 2007
    Publication date: May 29, 2008
    Inventors: Eric Girvan Roche, John Andrew Lawson, Alan David Stuart