Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2008-07-02
2010-11-09
Vanoy, Timothy C (Department: 1793)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S594120
Reexamination Certificate
active
07829061
ABSTRACT:
The zirconium oxide hydrate particles of the present invention are represented by the formula ZrO2.nH2O and have a mean primary particle size of 0.5 nm or more and 5 nm or less, and “n” in the formula represents a number greater than 2.5. Moreover, the method for producing of zirconium oxide hydrate particles of the present invention includes the step of preparing zirconium oxide hydrate particles by adding an aqueous zirconium salt solution to an aqueous alkaline solution while controlling the pH to 7.0 or more and 13.0 or less, and the step of subjecting the zirconium oxide hydrate particles to a hydrothermal treatment in the presence of water at a temperature of 50° C. or more and less than 110° C. for 3 hours or more.
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Hirashige Takayuki
Kishimoto Mikio
Matsuo Kazutaka
Morishima Makoto
Sawaki Yuko
Birch & Stewart Kolasch & Birch, LLP
Hitachi , Ltd.
Hitachi Maxwell Ltd.
Hou Michelle
Vanoy Timothy C
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