Granted Patent
Utility
US 4,507,221 · App. 06/510,111
Anthraquinone dye and liquid crystal composition containing the same
Inventors:
Shuji Imazeki, Akio Mukoo, Mikio Sato, Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama
Patented Case
View Patent ↗
Granted: Mar 26, 1985
Filed: Jul 1, 1983
Inventors
Shuji Imazeki
Akio Mukoo
Mikio Sato
Masaharu Kaneko
Tetsuo Ozawa
Tomio Yoneyama
Assignees (at issue)
Mitsubishi Chemical Industries, Ltd.
HITACHI, 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.