Production of paper and paper board
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 16, 2000
Grant Date -
N/A
app pub date -
Nov 28, 1997
filing date -
Nov 28, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Paper or paper board is made by adding cationic polymeric retention aid to a cellulosic supension, shearing the suspension to degrade the resultant flocs, aggregating the suspension by adding an aqueous composition of bentonite or other anionic bridging coagulant in the presence of anionic dye, pigment or optical brightening agent, and forming paper from the aggregated suspension.
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Cited Art Landscape
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