Granted Patent
Utility
US 6,551,670 · App. 09/824,102
Chiral nematic liquid crystal composition and liquid crystal optical element
Inventors:
Shinya Tahara, Satoshi Niiyama
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Apr 3, 2001
Inventors
Shinya Tahara
Satoshi Niiyama
Assignee (at issue)
OPTREX 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.