Granted Patent
Utility
US 4,459,218 · App. 06/385,400
Composition for liquid crystal color display
Inventors:
Yasuyuki Yamada, Tadaaki Tanaka, Ryoichi Tukahara, Tsutomu Nishizawa
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: May 21, 1982
Inventors
Yasuyuki Yamada
Tadaaki Tanaka
Ryoichi Tukahara
Tsutomu Nishizawa
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.