Granted Patent
Utility
US 4,519,948 · App. 06/527,891
Process for oxidizing a phenol to a p-benzoquinone
Inventors:
Chao-Yang Hsu, James E. Lyons
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Aug 30, 1983
Inventors
Chao-Yang Hsu
James E. Lyons
Assignee (at issue)
SUN-TECH LIMITED
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.