Layered cementitous composition which time releases permanganate ion
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United States of America Patent
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Nov 16, 1993
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N/A
app pub date -
Oct 7, 1991
filing date -
Apr 29, 1988
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Abstract
A layered composition which includes a hardened core comprising at least about 50 weight percent permanganate which composition releases permanganate ion into an aqueous media over time is described. A method of making and using the composition of the invention also are described.
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