Patents Represented by Attorney, Agent or Law Firm Karen G. Kaisler, Esq.
  • Cationic polysaccharides and reagents for their preparation
    Patent number: 6193843
    Abstract: Cationic polysaccharide derivatives are prepared by reacting a polysaccharide with a polycationic reagent having one polysaccharide reactive group and at least two cationic groups. Suitable reagents include polycationic alkyl, aryl, alkaryl, cycloaliphatic, or heterocyclic amines, some of which are novel compositions. The polycationic polysaccharide derivatives prepared from these reagents are useful in the manufacture of paper.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: February 27, 2001
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: John (Ji-Hsiung) Tsai, Peter T. Trzasko, Michael T. Philbin, Robert L. Billmers, Martin M. Tessler, Joseph A. Van Gompel, Morton W. Rutenberg