Patents by Inventor Jessica E. Kogel

Jessica E. Kogel 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 color and brightness of discolored goethite-containing materials
    Patent number: 5891236
    Abstract: Materials, such as kaolin clays, which are discolored by the presence of goethite mineral impurities are first heated to convert the goethite to hematite and then treated to remove the hematite, whereby the color and brightness of the product are improved over the starting material.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: April 6, 1999
    Assignee: Thiele Kaolin Company
    Inventors: Jessica E. Kogel, Randy K. Hall
  • Process for the microwave beneficiation of discolored kaolin clay materials
    Patent number: 5830818
    Abstract: Kaolin clay materials containing discoloring impurities can be beneficiated by microwave irradiation in the presence of water and a polyprotic acid component to produce a beneficiated kaolin clay material having improved color and brightness.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: November 3, 1998
    Assignee: Thiele Kaolin Company
    Inventors: Jeffrey C. Bruns, Jessica E. Kogel, Susan A. Lewis
  • Reduction of microorganisms in kaolin clay slurries
    Patent number: 5496398
    Abstract: A biologically stable kaolin clay slurry is manufactured by heating a kaolin clay slurry for at least 15 minutes at a temperature of at least 93.degree. C., cooling the slurry to a temperature no greater than about 35.degree. C. and then adding a microbiocide to the slurry.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: March 5, 1996
    Assignee: Thiele Kaolin Company
    Inventors: Sharon M. Drew, Jeffrey C. Bruns, Jessica E. Kogel