Granted Patent
Utility
US 5,356,561 · App. 07/813,032
Carboxylate compounds, liquid crystal compositions and liquid crystal elements containing said compounds and method of optical modulation using said elements
Inventors:
Toyoji Shimizu, Shinichi Nishiyama, Nobuyuki Doi, Shoichi Miyakoshi, Tooru Yamanaka, Katsuo Taniguchi, Hideo Hama
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Dec 24, 1991
Inventors
Toyoji Shimizu
Shinichi Nishiyama
Nobuyuki Doi
Shoichi Miyakoshi
Tooru Yamanaka
Katsuo Taniguchi
Hideo Hama
Assignee (at issue)
Mitsui Petrochemical 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.