Granted Patent
Utility
US 5,246,622 · App. 07/731,978
Liquid crystal racemic mixture, liquid crystal composition and liquid crystal element, process for manufacturing liquid crystal element, and uses of liquid crystal element
Inventors:
Toyoji Shimizu, Katsuo Taniguchi, Shinichi Nishiyama, Shoichi Miyakoshi, Tooru Yamanaka, Nobuyuki Doi, Hideo Hama
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Jul 18, 1991
Inventors
Toyoji Shimizu
Katsuo Taniguchi
Shinichi Nishiyama
Shoichi Miyakoshi
Tooru Yamanaka
Nobuyuki Doi
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.