Granted Patent
Utility
US 4,853,471 · App. 07/122,554
2-(2-Hydroxyphenyl)-benztriazoles, their use as UV-absorbers and their preparation
Inventors:
Jean Rody, Mario Slongo
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Nov 12, 1987
Inventors
Jean Rody
Mario Slongo
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.