Granted Patent
Utility
US 5,101,033 · App. 07/619,287
Process for preparing reactive hindered amine light stabilizers
Inventors:
Robert T. Kazmierczak, Ronald E. MacLeay
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Nov 27, 1990
Inventors
Robert T. Kazmierczak
Ronald E. MacLeay
Assignee (at issue)
Atochem North America, Inc.
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.