Granted Patent
Utility
US 4,642,350 · App. 06/810,544
Novel process for preparation of benzotriazoles using aryldiols and quinones
Inventors:
Alexander Davatz, Tibor Somlo
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Dec 18, 1985
Inventors
Alexander Davatz
Tibor Somlo
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.