Fire door
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 7, 1988
Grant Date -
N/A
app pub date -
Jul 30, 1985
filing date -
Jul 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fire door comprising a core and edge banding, the principal ingredients of the core being expanded perlite, gypsum and cement, the edge banding comprising a strip of natural wood, a strip of a cast mixture of which the principal ingredient is gypsum and an intervening strip of plastic laminate.
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Cited Art Landscape
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