Prismatic retroreflective article and method
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United States of America Patent
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Mar 27, 2007
Grant Date -
Jun 29, 2006
app pub date -
Dec 28, 2004
filing date -
Dec 28, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A prismatic retroreflective article has a transparent body portion and a layer of internally reflecting cube-corner optical elements having an open air-exposed rear surface at least a portion of which is more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical element. The article may be made by providing a transparent body portion bearing a layer of internally reflecting open air-exposed cube-corner optical elements; treating or coating at least a portion of the cube-corner elements to make the treated or coated portion more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical elements; and leaving such treated or coated portion exposed to the open air.
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