MICRONEEDLE SHEET
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United States of America Patent
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Issued Date -
Feb 23, 2017
app pub date -
Feb 19, 2015
filing date -
Feb 27, 2014
priority date (Note) -
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Abstract
A microneedle sheet according to an embodiment includes a plurality of microneedles formed on a sheet generally along a principal surface of the sheet. The material of the microneedles is selected from among hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyvinyl alcohol, and a graft copolymer of polyvinyl alcohol and polyethylene glycol. The microneedles are raised from the principal surface by bending the sheet, and the raised microneedles pierce skin.
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