Methods of making doubly porous device
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United States of America Patent
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-
Dec 31, 1996
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Oct 18, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is directed to methods of forming doubly porous devices having a first porous portion with continuously interconnected pores and a second porous portion with continuously interconnected pores utilizing at least one removable open-cell porous mold form. The mold form is made from a selected material comprising particles having predetermined sizes and shapes which is capable of forming a stable mold form under selected conditions and of being removed under selected conditions. At least one stable coating layer is molded from the mold form to define a membrane separating the first porous portion and the second porous portion of said device. Alternatively, two different materials can be molded with the mold form into a doubly porous device comprising interlocked materials.
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