Patents Represented by Attorney Ellen Dec

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  • Amphoteric starches and process for their preparation
    Patent number: 4964953
    Abstract: Improved non-crosslinked and non-degraded amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have use as wet-end additives and provide improved drainage properties in the manufacture of paper.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: October 23, 1990
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Daniel B. Solarek, Teresa A. Dirscherl, Henry R. Hernandez, Wadym Jarowenko