Granted Patent
Utility
US 5,145,991 · App. 07/701,299
Distyrylbiphenyl compounds
Inventors:
Kurt Weber, Claude Eckhardt
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: May 13, 1991
Inventors
Kurt Weber
Claude Eckhardt
Assignee (at issue)
Ciba-Geigy
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.