Hard-backed lampshade
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United States of America Patent
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-
Jan 12, 1999
Grant Date -
N/A
app pub date -
Mar 31, 1997
filing date -
Mar 31, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lampshade includes a self-supporting backing member constituted of an extruded oriented polystyrene and an additive including a light-reflecting powdered filler, especially titanium dioxide, co-extruded with the oriented polystyrene and weighing in the range of 1%-10% of the total weight of the polystyrene. A fire-retarding filler, for example, antimony oxide, is also coextruded.
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