Anionic polymers composed of dicarboxylic acids and uses thereof
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United States of America Patent
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Jun 22, 2004
Grant Date -
Sep 25, 2003
app pub date -
Jun 4, 2003
filing date -
Mar 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.
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