Patents by Inventor Nicholas Warwick Bristow

Nicholas Warwick Bristow 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).

  • Extraction of uranium from wet-process phosphoric acid
    Patent number: 8685349
    Abstract: A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: April 1, 2014
    Assignee: Urtek, LLC
    Inventors: Nicholas Warwick Bristow, Mark S. Chalmers, James Andrew Davidson, Bryn Llywelyn Jones, Paul Robert Kucera, Nick Lynn, Peter Douglas Macintosh, Jessica Mary Page, Thomas Charles Pool, Marcus Worsley Richardson, Karin Helene Soldenhoff, Kelvin John Taylor, Colin Wayrauch
  • Extraction of Uranium from Wet-Process Phosphoric Acid
    Publication number: 20130022519
    Abstract: A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.
    Type: Application
    Filed: July 23, 2012
    Publication date: January 24, 2013
    Inventors: Nicholas Warwick Bristow, Mark S. Chalmers, James Andrew Davidson, Bryn Llywelyn Jones, Paul Robert Kucera, Nick Lynn, Peter Douglas Macintosh, Jessica Mary Page, Thomas Charles Pool, Marcus Worsley Richardson, Karin Helene Soldenhoff, Kelvin John Taylor, Colin Wayrauch
  • Extraction of Uranium from Wet-Process Phosphoric Acid
    Publication number: 20130022520
    Abstract: A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.
    Type: Application
    Filed: July 23, 2012
    Publication date: January 24, 2013
    Inventors: Nicholas Warwick Bristow, Mark S. Chalmers, James Andrew Davidson, Bryn Llywelyn Jones, Paul Robert Kucera, Nick Lynn, Peter Douglas Macintosh, Jessica Mary Page, Thomas Charles Pool, Marcus Worsley Richardson, Karin Helene Soldenhoff, Kelvin John Taylor, Colin Wayrauch
  • Extraction of uranium from wet-process phosphoric acid
    Patent number: 8226910
    Abstract: A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: July 24, 2012
    Assignee: Urtek, LLC
    Inventors: Nicholas Warwick Bristow, Mark S. Chalmers, James Andrew Davidson, Bryn Llywelyn Jones, Paul Robert Kucera, Nick Lynn, Peter Douglas Macintosh, Jessica Mary Page, Thomas Charles Pool, Marcus Worsley Richardson, Karin Helene Soldenhoff, Kelvin John Taylor, Colin Weyrauch
  • EXTRACTION OF URANIUM FROM WET-PROCESS PHOSPHORIC ACID
    Publication number: 20100028226
    Abstract: A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.
    Type: Application
    Filed: July 28, 2009
    Publication date: February 4, 2010
    Inventors: Nicholas Warwick Bristow, Mark S. Chalmers, James Andrew Davidson, Bryn Llywelyn Jones, Paul Robert Kucera, Nick Lynn, Peter Douglas Macintosh, Jessica Mary Page, Thomas Charles Pool, Marcus Worsley Richardson, Karin Helene Soldenhoff, Kelvin John Taylor, Colin Weyrauch