Patents by Inventor William Harvey Morrison,

William Harvey Morrison, 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).

  • Passivated nano-titanium dioxide particles and methods of making the same
    Publication number: 20080299056
    Abstract: The invention is directed to a method for reducing the chemical activity and photo activity of titanium dioxide nanoparticles comprising adding a densifying agent, such as citric acid, to an aqueous slurry of the titanium dioxide nanoparticles; treating the aqueous slurry with a source of silica, such as a solution of sodium silicate, to form silica treated titanium dioxide nanoparticles; treating the silica treated titanium dioxide nanoparticles with a source of alumina, such as a solution of sodium aluminate, to form silica and alumina treated titanium dioxide nanoparticles. The titanium dioxide nanoparticles described herein are useful in cosmetic, coating and polymer compositions.
    Type: Application
    Filed: July 2, 2007
    Publication date: December 4, 2008
    Inventors: Scott Rickbeil Frerichs, William Harvey Morrison, JR.
  • Lower-energy process for preparing passivated inorganic nanoparticles
    Patent number: 7276231
    Abstract: The disclosure is directed to a method for reducing the chemical activity and photo activity of titanium dioxide nanoparticles comprising adding an amorphous alumina-stabilizing agent, specifically an anion, such as citric acid, to an aqueous slurry of the titanium dioxide nanoparticles; treating the aqueous slurry with a source of alumina, such as a solution of sodium aluminate, to form alumina-treated titanium dioxide nanoparticles; recovering the alumina-treated inorganic nanoparticles, wherein the nanoparticles have a particle size of about 50 to about 300 nm; and milling the nanoparticles to form nanoparticles having a particle size about 15% smaller than silica-treated inorganic nanoparticles milled under similar conditions. The titanium dioxide nanoparticles described herein are useful in cosmetic, coating and thermoplastic compositions.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: October 2, 2007
    Assignee: E I du Pont de Nemours and Company
    Inventors: Scott Rickbeil Frerichs, William Harvey Morrison, Jr., Douglas Eric Spahr
  • Unfinished rutile titanium dioxide slurry for paints and paper coatings
    Patent number: 7186770
    Abstract: The present invention relates to a rutile titanium dioxide slurry made directly from an unfinished titanium dioxide pigment produced from either the chloride or sulfate process.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: March 6, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William Harvey Morrison, Jr., Brian William Sullivan
  • Unfinished rutile titanium dioxide slurry for paints and paper coatings
    Patent number: 6790902
    Abstract: The present invention relates to a rutile titanium dioxide slurry made directly from an unfinished titanium dioxide pigment produced from either the chloride or sulfate process.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: September 14, 2004
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: William Harvey Morrison, Jr., Brian William Sullivan
  • Unfinished rutile titanium dioxide slurry for paints and paper coatings
    Publication number: 20040162383
    Abstract: The present invention relates to a rutile titanium dioxide slurry made directly from an unfinished titanium dioxide pigment produced from either the chloride or sulfate process.
    Type: Application
    Filed: November 17, 2003
    Publication date: August 19, 2004
    Inventors: William Harvey Morrison Jr, Brian William Sullivan
  • Unfinished rutile titanium dioxide slurry for paints and paper coatings
    Publication number: 20020091192
    Abstract: The present invention relates to a rutile titanium dioxide slurry made directly from an unfinished titanium dioxide pigment produced from either the chloride or sulfate process.
    Type: Application
    Filed: September 11, 2001
    Publication date: July 11, 2002
    Inventors: William Harvey Morrison,, Brian William Sullivan