Patents by Inventor Mortimer Weiser

Mortimer Weiser has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Trisazo black dyes from 2-(4'-aminophenylazo)-7-amino-1-naphthol-3-sulfonic acid
    Patent number: 4737240
    Abstract: Black trisazo dyes for cellulosic textiles, leather and especially paper having the structure ##STR1## where A is ##STR2## one of B.sub.1 and B.sub.2 is hydrogen and the other is --SO.sub.3 M or a mixture thereof, and M is hydrogen, sodium, potassium, lithium or --HNR.sub.1 R.sub.2 R.sub.3 wherein R.sub.1, R.sub.2 and R.sub.3 represent the same or different substituents selected from hydrogen, lower alkyl and lower hydroxyalkyl, and stable liquid concentrates of these dyes are described.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: April 12, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Herbert S. Davis, Roy E. Smith, Mortimer Weiser