Granted Patent
Utility
US 5,773,172 · App. 08/659,616
Color filter having novel dyestuff
Inventors:
Akio Karasawa, Hisato Itoh
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Jun 6, 1996
Inventors
Akio Karasawa
Hisato Itoh
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.