Radiation exposure history indicator
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United States of America Patent
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N/A
Issued Date -
May 24, 2007
app pub date -
Nov 5, 2004
filing date -
Nov 6, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A radiation exposure history indicator sheet comprises a base material sheet which has a color-changing layer on at least a part of the surface comprising: a polymer compound having a hydroxyl group and at least one group selected from a halogen group and an acetal group; a coloring organic electron donor compound; an active species-generating organic compound for making the organic electron donor compound colored by a radiation; and a radiation absorbent and/or a radiation-excite fluorescent agent.
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