Patents by Inventor Michael Warren Ott

Michael Warren Ott 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).

  • Method for making a photodurable aqueous titanium dioxide pigment slurry using a high level of aluminum co-oxidant
    Patent number: 5824146
    Abstract: This invention relates to a new method for making a photodurable, aqueous titanium dioxide (TiO.sub.2) pigment slurry. This method involves reacting titanium tetrachloride, aluminum chloride and an oxygen-containing gas in the presence of a nucleant in the vapor phase to produce TiO.sub.2 pigment. A sufficient amount of aluminum chloride is added to provide at least 2 wt. % alumina in the TiO.sub.2 pigment. The TiO.sub.2 pigment is separated from the reaction gases; and mixed with sufficient water to produce a TiO.sub.2 slurry comprising at least 78 wt. % TiO.sub.2 solids. The slurry may be used in coating formulations such as paints.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: October 20, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Michael Warren Ott
  • Method for making a photodurable aqueous titanium dioxide pigment slurry
    Patent number: 5824145
    Abstract: This invention relates to a new method for making a photodurable, aqueous titanium dioxide (TiO.sub.2) pigment slurry. The method involves mixing amorphous alumina, TiO.sub.2 pigment particles, water, and at least one dispersant to form the slurry. The initial slurry comprises at least about 78 wt. % TiO.sub.2 solids and at least about 3 wt. % alumina. The resulting slurry may be diluted to a lower TiO.sub.2 solids content and subsequently screened and media-milled. The titanium dioxide pigment slurry is suitable for use in coatings formulations such as paints.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: October 20, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Elroy Marganski, Michael Warren Ott
  • TiO.sub.2 slurry process
    Patent number: 5653793
    Abstract: A process for enhancing the optical efficiency of TiO.sub.2 slurries is disclosed.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: August 5, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael Warren Ott, Rajeev Lochan Gorowara, Robert William Johnson