Patents by Inventor Phillip James DUNDAS

Phillip James DUNDAS 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 improving the grade and optical quality of zircons
    Patent number: 11066726
    Abstract: A process for improving the grade and optical quality of zircon, comprising: baking a mixture of a zircon feed and concentrated sulphuric acid at a baking temperature in the range of from 200 up to 400° C., and for a time to form water leachable sulphates with impurities therein including at least iron and titanium; leaching the baked mixture to dissolve the leachable sulphates; and separating the zircon from the leachate containing the leached sulphates, which separated zircon is thereby of improved grade and optical quality.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: July 20, 2021
    Assignee: ILUKA Resources Limited
    Inventor: Phillip James Dundas
  • Process for Improving the Grade and Optical Quality of Zircons
    Publication number: 20180023170
    Abstract: A process for improving the grade and optical quality of zircon, comprising: baking a mixture of a zircon feed and concentrated sulphuric acid at a baking temperature in the range of from 200 up to 400° C., and for a time to form water leachable sulphates with impurities therein including at least iron and titanium; leaching the baked mixture to dissolve the leachable sulphates; and separating the zircon from the leachate containing the leached sulphates, which separated zircon is thereby of improved grade and optical quality.
    Type: Application
    Filed: February 8, 2016
    Publication date: January 25, 2018
    Inventor: Phillip James DUNDAS