Check valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 26, 1991
Issued Date -
N/A
app pub date -
Mar 3, 1989
filing date -
Sep 7, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved liquid flow check valve using a ball and seat wherein the seat is made of sintered ceramic. The improved valve will operate in an environment of acetonitrile and water without sticking shut, thereby providing more stable liquid flow rates in liquid chromatography systems.
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