Granted Patent
Utility
US 5,240,975 · App. 07/803,303
Liquid substituted 2H-benzotriazole mixtures, stabilized compositions
Inventors:
Roland A. E. Winter, Robert Detlefsen, Werner Stegmann, Reto Luisoli, David G. Leppard
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Dec 4, 1991
Inventors
Roland A. E. Winter
Robert Detlefsen
Werner Stegmann
Reto Luisoli
David G. Leppard
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.