Granted Patent
Utility
US 4,308,162 · App. 06/214,369
Novel yellow azo dyes and dichroic liquid crystal compositions made therewith
Inventors:
Herbert S. Cole, Jr., Siegfried Aftergut
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Dec 8, 1980
Inventors
Herbert S. Cole, Jr.
Siegfried Aftergut
Assignee (at issue)
General Electric Company
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.