Granted Patent
Utility
US 6,121,456 · App. 09/048,850
2-(2'Hydroxyphenyl) benzotriazoles and process for their preparation
Inventors:
Rosa Maria Riva, Carlo Neri, Rosalba Colombo
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Mar 27, 1998
Inventors
Rosa Maria Riva
Carlo Neri
Rosalba Colombo
Assignee (at issue)
Great Lakes Chemical (Europe) GmbH
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.