Patents by Inventor Jorge L. Yordan

Jorge L. Yordan 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).

  • Kaolin clays which are conditioned prior to removing impurities
    Patent number: 6007618
    Abstract: Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture having a solids content of at least 65 percent by weight and (B) then deflocculating the kaolin clay mixture at a pH of at least 4.0 with a dispersant in amounts sufficient to yield a kaolin clay slurry which is suitable for subsequent processing to remove colored titaniferous impurities.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: December 28, 1999
    Assignee: Thiele Kaolin Company
    Inventors: Joseph Allen Norris, Jorge L. Yordan
  • Process for removing impurities from kaolin clays
    Patent number: 5891326
    Abstract: Colored impurities are removed from kaolin clay by an improved flotation process in which a blend of a fatty acid compound and a hydroxamate compound is used as a collector.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: April 6, 1999
    Assignee: Thiele Kaolin Company
    Inventors: Joseph C. S. Shi, Jorge L. Yordan
  • Process for conditioning kaolin clays prior to removing impurities
    Patent number: 5685899
    Abstract: Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture having a solids content of at least 65 percent by weight and (B) then deflocculating the kaolin clay mixture at a pH of at least 4.0 with a dispersant in amounts sufficient to yield a kaolin clay slurry which is suitable for subsequent processing to remove colored titaniferous impurities.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: November 11, 1997
    Assignee: Thiele Kaolin Company
    Inventors: Joseph Allen Norris, Jorge L. Yordan
  • Kaolin clay slurries having reduced viscosities and process for the manufacture thereof
    Patent number: 5593490
    Abstract: A kaolin clay slurry having a reduced viscosity is manufactured by a process which comprises the sequential steps of mechanically working an undispersed crude kaolin clay material having a solids content of at least about 65 percent, by weight, under conditions which insure that the kaolin clay material will be subjected to an energy level of at least 10 horsepower-hours per ton of dry kaolin clay material and then subjecting the mechanically worked kaolin clay material to centrifugation to substantially remove any particles having a diameter less than about 0.2 microns.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: January 14, 1997
    Assignee: Thiele Kaolin Company
    Inventors: Owen E. Etheridge, Jr., Jorge L. Yordan, Robert A. Lowe
  • Process for removing impurities from kaolin clays
    Patent number: 5522986
    Abstract: Colored impurities are removed from kaolin clay by an improved flotation process in which a blend of a fatty acid compound and a hydroxamate compound is used as a collector.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: June 4, 1996
    Assignee: Thiele Kaolin Company
    Inventors: Joseph C. S. Shi, Jorge L. Yordan
  • High solids slurries of structured kaolin clay materials having improved high shear rheology and process for the manufacture thereof
    Patent number: 5424259
    Abstract: A high solids structured kaolin clay slurry having improved high shear rheology is manufactured by a process which comprises the sequential steps of forming an aqueous composition by mixing water and a lithium-based dispersant and then mixing structured kaolin clay particles with the aqueous composition to form the desired high solids slurry.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: June 13, 1995
    Assignee: Thiele Kaolin Company
    Inventors: Jorge L. Yordan, David R. Collins