Granted Patent
Utility
US 5,356,558 · App. 08/094,353
Tolane derivatives, liquid crystal compositions containing the derivatives and liquid crystal display devices using the compositions
Inventors:
Shuhei Yamada, Shuji Ikukawa, Jun Ito, Jitsuko Nakayama
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Jul 21, 1993
Inventors
Shuhei Yamada
Shuji Ikukawa
Jun Ito
Jitsuko Nakayama
Assignee (at issue)
SEIKO EPSON 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.