Composite structure and method of making
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United States of America Patent
Stats
-
Aug 29, 1989
Grant Date -
N/A
app pub date -
May 15, 1991
filing date -
May 15, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite structure, particularly a filter structure, is provided comprising a support having a surface and a porous membrane formed integrally to the surface of the support. The support preferably includes means for directing a fluid away from the surface of the support. The support surface is at least slightly soluble in a solvent. The porous membrane comprises a resin soluble in the solvent and precipitated while the casting solution is in contact with a porous substrate and the surface of the support. The membrane is formed and integrally secured to the surface of the support contemporaneously.
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