Building materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 23, 1999
Grant Date -
N/A
app pub date -
Dec 31, 1997
filing date -
Feb 24, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A building product has an exposed surface provided by a multiplicity of linearly extending parallel asymmetric depressions of saw tooth configuration. Thus, a coloured exposed surface appearance apparently changes colour as relative positions of the building product and viewer change.
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International Classification(s)
Cited Art Landscape
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