Patents Represented by Attorney Trevor J. Lumb

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  • Precipitated calcium carbonate-cationic starch binder as retention aid system for papermaking
    Patent number: 4892590
    Abstract: A two component binder system comprising a highly dispersible, high specific surface area precipitated calcium carbonate (colloidal PCC) and a cationic starch, especially a cationic potato starch, for improving filler retention, opacity and strength during papermaking.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: January 9, 1990
    Assignee: Pfizer Inc.
    Inventors: Robert A. Gill, Nigel D. Sanders