Patents Examined by John M. Couert
  • Microcapsules with improved polyurea walls
    Patent number: 4847152
    Abstract: Improved microcapsules contain at least one wall which is the reaction product of at least one isocyanate-reactive group and an aromatic isocyanate which hasthe formula: ##STR1## in which n=8 to 20. The microcapsules are useful in carbonless copy paper.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: July 11, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gert Jabs, Ulrich Nehen, Hans J. Scholl