Spill-proof closure
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United States of America Patent
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Feb 16, 1993
Grant Date -
N/A
app pub date -
Oct 15, 1991
filing date -
Oct 15, 1991
priority date (Note) -
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Abstract
A spill-proof closure for containers used in dispensing liquid beverages. The closure has a spout containing a thin membrane at or near the upper end. The thin membrane includes a through slit which remains closed except when external suction is applied during normal drinking.
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