Granted Patent
Utility
US 4,610,804 · App. 06/592,255
Anthraquinone dyes and liquid crystal compositions including the same
Inventors:
Shuji Imazeki, Akio Mukoh, Mikio Sato, Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Mar 22, 1984
Inventors
Shuji Imazeki
Akio Mukoh
Mikio Sato
Masaharu Kaneko
Tetsuo Ozawa
Tomio Yoneyama
Assignees (at issue)
HITACHI, LTD.
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.