Mold material made with additives
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United States of America Patent
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Dec 15, 1998
Issued Date -
N/A
app pub date -
Sep 29, 1995
filing date -
Mar 31, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a composition of polystyrene or polypropylene with at least 0.5% (w/w)of an additive or wetting agent, the article of manufacture comprised thereof, such as a mold for making contact lenses and the mold assembly containing said mold, and the use of such mold so to minimize defects, such as holes, puddles, chips and tears in the lens.
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