Granted Patent
Utility
US 4,661,645 · App. 06/836,902
Synthesis of styrenated hydroquinone
Inventors:
David M. Lee, David A. Hutchings, Gloria M. Sieloff, G. Fred Willard
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Mar 6, 1986
Inventors
David M. Lee
David A. Hutchings
Gloria M. Sieloff
G. Fred Willard
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.