Granted Patent
Utility
US 5,389,287 · App. 08/090,820
Antiferroelectric liquid crystal composite material, process for preparing the same, and liquid crystal element using the same
Inventors:
Shinichi Nishiyama, Mitsuko Nagai, Hideo Hama, Tooru Yamanaka
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Jul 13, 1993
Inventors
Shinichi Nishiyama
Mitsuko Nagai
Hideo Hama
Tooru Yamanaka
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.