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United States of America Patent
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-
Sep 13, 1983
Issued Date -
N/A
app pub date -
Sep 2, 1981
filing date -
May 25, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Polymeric material comprising at least four polymeric constituents which comprise mer units of the following types: I. acrylamide or derivatives thereof II. acrylonitrile or derivatives thereof III. acrylic acid and esters, or derivatives thereof IV. alkylol, sulphonyl or phosphonyl derivatives of I. The polymeric materials are useful as components of water bearing systems which are in the form of gels or suspensions.
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