Patents by Inventor Jeffrey C. Bruns

Jeffrey C. Bruns 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 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: 5647895
    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: February 20, 1996
    Date of Patent: July 15, 1997
    Assignee: Thiele Kaolin Company
    Inventors: Sharon M. Drew, Jeffrey C. Bruns, Jessica Elzea Kogel
  • Stable high solids slurries of structured clay materials and process for the manufacture thereof
    Patent number: 5543372
    Abstract: A stable high solids structured clay slurry is manufactured by a process which comprises the sequential steps of forming a high solids slurry by mixing a structured clay material with water in a first stage mixing step under conditions which promote particle to liquid contact and which substantially prevent interaction between the structured clay particles, terminating the first stage mixing and then, in a second stage mixing step, mixing the high solids slurry under conditions which are different from the first stage mixing conditions and which promote substantial interaction between the structured clay particles.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: August 6, 1996
    Assignee: Thiele Kaolin Company
    Inventors: Joseph C. S. Shi, William H. Blue, Jeffrey C. Bruns
  • 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