Granted Patent
Utility
US 6,168,728 · App. 09/380,875
Acetylene derivatives, and liquid crystal composition and liquid crystal display device each comprising the same
Inventors:
Kazutoshi Miyazawa, Kouji Koga, Shuichi Matsui, Norihisa Hachiya, Etsuo Nakagawa
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Sep 10, 1999
Inventors
Kazutoshi Miyazawa
Kouji Koga
Shuichi Matsui
Norihisa Hachiya
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.