Patents by Inventor James T. Dew

James T. Dew 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).

  • Silica-based particulates
    Patent number: 7253224
    Abstract: A silica-based particulate material that may contain less than 5 wt. % of a multivalent cation and a method of preparing such a silica-based particulate material. The silica-based particulate material may be characterized as having a median particle size of at least 20 ?m, a BET surface area of at least 90 m2/g, and a pH of at least 9.5; or as having a median particle size of up to 20 ?m and a pH of at least 10. The silica-based particulate material may be used to make hydrophobic silica-based particulates, which may be characterized as having a pH of at least 10.5.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: August 7, 2007
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Shantilal M. Mohnot, Harold E. Swift, James T. Dew
  • Silica-based particulates
    Publication number: 20030114542
    Abstract: A silica-based particulate material that may contain less than 5 wt. % of a multivalent cation and a method of preparing such a silica-based particulate material. The silica-based particulate material may be characterized as having a median particle size of at least 20 &mgr;m, a BET surface area of at least 90 m2/g, and a pH of at least 9.5; or as having a median particle size of up to 20 &mgr;m and a pH of at least 10. The silica-based particulate material may be used to make hydrophobic silica-based particulates, which may be characterized as having a pH of at least 10.5.
    Type: Application
    Filed: August 1, 2002
    Publication date: June 19, 2003
    Inventors: Shantilal M. Mohnot, Harold E. Swift, James T. Dew
  • Amorphous precipitated silica having large liquid carrying capacity
    Patent number: 5906843
    Abstract: Substantially dry free-flowing particles of amorphous precipitated silica have large sizes and large carrying capacities for organic liquids, and they contain little or no dust.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: May 25, 1999
    Assignee: PPG Industries, Inc.
    Inventors: James T. Dew, Larry R. Evans, Diana L. Scott, Walter H. Waddell
  • Particulate amorphous precipitated silica
    Patent number: 5353999
    Abstract: A statistically large population of particles of amorphous precipitated silica is substantially free of particles of amorphous precipitated silica which are retained on a 20 mesh sieve screen, and is characterized by at least 90 percent by weight of said particles of said population being retained on a 200 mesh sieve screen. Such a population may be produced by cracking amorphous precipitated silica particles between the textured rolls of at least one roll pair.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: October 11, 1994
    Assignee: PPG Industries, Inc.
    Inventors: James T. Dew, Larry R. Evans, Walter H. Waddell
  • Precipitated silica carrier for vitamins
    Patent number: 4717561
    Abstract: Free flowing, substantially dust-free, dense granular amorphous precipitated silica having a principal particle size of between about 0.14 millimeters and about 0.84 millimeters are described. This material is particularly suitable as an inert carrier for water-soluble and fat soluble nutritional supplements, e.g., vitamins, which are added to feeds for livestock.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: January 5, 1988
    Assignee: PPG Industries, Inc.
    Inventors: Thomas G. Krivak, Stanley A. Heimburger, James T. Dew
  • Animal feed supplement
    Patent number: 4617294
    Abstract: Free flowing, substantially dust-free, dense granular amorphous precipitated silica having a principal particle size of between about 0.14 millimeters and about 0.84 millimeters are described. This material is particularly suitable as an inert carrier for water-soluble and fat soluble nutritional supplements, e.g., vitamins, which are added to feeds for livestock.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: October 14, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Thomas G. Krivak, Stanley A. Heimburger, James T. Dew