Disperse and acid azo dyes having one or two cinnamoyl substituents on a benzothiazole or benzoisothiazole diazonium moiety and having an aniline, tetrahydroquinoline or benzomorpholine type coupler

Granted: Nov 12, 1985 Filed: Jan 23, 1984

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.