Granted Patent
Utility
US 4,436,522 · App. 06/336,482
Disperse dye composition
Inventors:
Toshio Niwa, Susumu Nagashima
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Dec 31, 1981
Inventors
Toshio Niwa
Susumu Nagashima
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.