Granted Patent
Utility
US 4,978,699 · App. 07/261,442
Light stabilizing flame retardants
Inventors:
Robert T. Kazmierczak, Ronald E. MacLeay
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Oct 24, 1988
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.