Compositions – Electrically conductive or emissive compositions – Metal compound containing
Reexamination Certificate
2004-07-22
2008-08-05
Kopec, Mark (Department: 1796)
Compositions
Electrically conductive or emissive compositions
Metal compound containing
C106S436000, C106S437000, C106S438000, C427S215000, C524S104000
Reexamination Certificate
active
07407606
ABSTRACT:
A method for producing a titanium dioxide powder having a well electroconductive layer containing substantially no antimony, which comprises providing a titanium dioxide powder containing specific amounts or less of alkali metals, such as sodium and potassium, alkaline earth metals, such as magnesium and calcium, and metals having a valence of four or less, such as aluminum, zinc and iron, preparing an aqueous suspension of the titanium dioxide powder, adding an acidic aqueous solution containing a tin compound and a phosphorus compound and an alkaline solution to the above aqueous suspension so that the aqueous suspension has a pH in the range of 2 to 6 or 8 to 12, and firing the resulting product at a temperature of 600 to 925° C.
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Chiba Katsuichi
Yasuda Yuichi
Ishihara Sangyo Kaisha Ltd.
Kopec Mark
Manelli Denison & Selter PLLC
Nguyen Khanh Tuan
White Paul E.
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