Patents by Inventor Krzysztof Borowiec

Krzysztof Borowiec 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).

  • TiO2 containing product including rutile, pseudo-brookite and ilmenite
    Patent number: 6531110
    Abstract: An upgraded titania slag product is described. A TiO2 containing product which includes rutile, pseudo-brookite and ilmenite is disclosed.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: March 11, 2003
    Assignee: QIT-fer et Titane Inc.
    Inventors: Krzysztof Borowiec, Alfonso E. Grau, Michel Gueguin, Jean-Francois Turgeon
  • Method to upgrade titania slag and resulting product
    Patent number: 5830420
    Abstract: A method is disclosed including: (a) sizing a titania slag to a particle size range of from 75 microns to 850 microns; (b) oxidizing the sized titania slag by contacting the sized titania slag with an oxygen containing gas at a temperature of at least about 950.degree. C. for a period of at least about 20 minutes such that a substantial portion of the iron oxide is converted to a ferric state, such that the reduced titanium oxides are converted to a tetravalent state, and such that at least a major portion of the glassy silicate phase is decomposed; (c) reducing the oxidized titania slag in a reducing atmosphere at a temperature of at least about 700.degree. C. for a period of at least about 30 minutes such that the ferric state iron oxide is converted to a ferrous state; (d) leaching the reduced titania slag with mineral acid at a temperature of at least 125.degree. C.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: November 3, 1998
    Assignee: QIT-Fer et Titane Inc.
    Inventors: Krzysztof Borowiec, Alfonso E. Grau, Michel Gueguin, Jean-Fran.cedilla.ois Turgeon