Granted Patent
Utility
US 4,525,583 · App. 06/457,822
Quaternary ammonium substituted benzothiazolylphenyl azo pyrimidine dyes
Inventor:
Jean-Marie Adam
Patented Case
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Granted: Jun 25, 1985
Filed: Jan 13, 1983
Inventor
Jean-Marie Adam
Assignee (at issue)
Ciba-Geigy
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.