Two-layer structural material with interdigitated protrusions
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United States of America Patent
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Issued Date -
Aug 10, 2006
app pub date -
Dec 9, 2005
filing date -
Dec 10, 2004
priority date (Note) -
Abandoned
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Abstract
A two-layer structural material of sandwich design is disclosed which comprises opposed, generally planar sheets having interlocking protrusions. The material may be formed of plastic resin, metal, paper, paperboard, or composite material and has increased rigidity over single sheet material without the complexity of 3-layer materials such as corrugated board and honeycomb-cored structures.
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