Granted Patent
Utility
US 5,688,995 · App. 08/649,940
o-Hydroxyphenyl-s-triazines
Inventors:
Helmut Luther, Dietmar Huglin, Bernd Herzog
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: May 15, 1996
Inventors
Helmut Luther
Dietmar Huglin
Bernd Herzog
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.