Granted Patent
Utility
US 4,707,546 · App. 06/822,680
Reactive monoazo dyestuffs
Inventors:
Toshio Niwa, Kiyoshi Himeno, Toshio Hihara
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jan 23, 1986
Inventors
Toshio Niwa
Kiyoshi Himeno
Toshio Hihara
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.