Granted Patent
Utility
US 5,250,698 · App. 07/926,105
2-(2-hydroxy-3-perfluoroalkyl thiomethyl-5-alkylphenyl)2H-benzotriazoles and stabilized compositions thereof
Inventors:
Robert A. Falk, Gregory R. Coughlin
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Aug 5, 1992
Inventors
Robert A. Falk
Gregory R. Coughlin
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.