Granted Patent
Utility
US 5,280,124 · App. 07/828,291
5-sulfonyl-substituted benzotriazole UV-absorbers
Inventors:
Roland A. E. Winter, Volker H. von Ahn, Tyler A. Stevenson, Mark S. Holt, Ramanathan Ravichandran
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Feb 5, 1992
Inventors
Roland A. E. Winter
Volker H. von Ahn
Tyler A. Stevenson
Mark S. Holt
Ramanathan Ravichandran
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.