Chemically-impregnated microporous films
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United States of America Patent
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-
Sep 15, 1981
Issued Date -
N/A
app pub date -
Oct 26, 1978
filing date -
Mar 31, 1975
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is disclosed a novel apparatus for the selective stretching of a coated or impregnated substrate of a synthetic thermoplastic polymer or blends thereof to form an impregnated microporous film thereof.
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