Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2005-04-28
2011-11-08
Silverman, Stanley (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
Reexamination Certificate
active
08052956
ABSTRACT:
Process for the production of a powdered spherical tungstic acid by acidification of an aqueous alkaline tungstate solution with mineral acid at elevated temperature, preferably in a continuous stirred tank or a cascade of at least 2 continuous stirred tanks, and tungstic acid obtainable in this way, which is characterized by a high bulk density and spherical morphology.
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Albrecht Sven
Kutzler Uwe
Meese-Marktscheffel Juliane
Olbrich Armin
Reiss Michael
Connolly Bove & Lodge & Hutz LLP
H. C. Starck GmbH
Silverman Stanley
Zimmer Anthony J
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