Granted Patent
Utility
US 6,692,657 · App. 09/323,820
Alkenyl compound having a negative &Dgr;&egr; value, liquid crystal composition, and liquid crystal display device
Inventors:
Takashi Kato, Tomoyuki Kondo, Henry Bernhardt, Shuichi Matsui, Hiroyuki Takeuchi, Yasuhiro Kubo, Fusayuki Takeshita, Etsuo Nakagawa
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Jun 2, 1999
Inventors
Takashi Kato
Tomoyuki Kondo
Henry Bernhardt
Shuichi Matsui
Hiroyuki Takeuchi
Yasuhiro Kubo
Fusayuki Takeshita
Etsuo Nakagawa
Assignee (at issue)
Chisso Corporation
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.