Patents Represented by Attorney Ostrager Flaherty & Onofrio Chong

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  • Bisazo dyes and their preparation and use
    Patent number: 5969115
    Abstract: Bisazo dyes of formula (IX) ##STR1## and of formula (X) ##STR2## wherein A, R.sub.4, M and n are as defined in the specification, are excellent dyes for dyeing and printing of cellulose containing materials and especially for the preparation of inks for ink jet printing.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: October 19, 1999
    Assignee: Ilford Imaging Switzerland GMBH
    Inventor: Heinz Peter