Granted Patent
Utility
US 4,552,684 · App. 06/586,981
Dichroic dye and liquid crystalline composition for color display
Inventors:
Yasuyuki Yamada, Tsutomu Nishizawa, Tamio Mikoda, Tooru Miyahara, Masaharu Kikutsugi
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Mar 7, 1984
Inventors
Yasuyuki Yamada
Tsutomu Nishizawa
Tamio Mikoda
Tooru Miyahara
Masaharu Kikutsugi
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.