Granted Patent
Utility
US 4,645,832 · App. 06/721,514
Cellulose fiber-reactive disazo or trisazo dyes having a triazine ring substituted by A(B-sulfatoethyl) sulfonylanilino group
Inventors:
Toshio Niwa, Yoshiaki Kato
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Apr 9, 1985
Inventors
Toshio Niwa
Yoshiaki Kato
Assignee (at issue)
Mitsubishi Chemical Industries, Ltd.
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.