Porous sheet
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 21, 1982
Grant Date -
N/A
app pub date -
May 29, 1981
filing date -
May 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A porous sheet is disclosed that comprises a thin, flexible sheet made of thermoplastic resin having solid particles distributed therein. Small spaces are formed around the particles, such that abrasion or buffing of the opposite surfaces of the sheet causes the formation of a multitude of fine pores that extend through the sheet, making the sheet vapor-permeable but liquid-impermeable.
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Family
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Cited Art Landscape
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