Granted Patent
Utility
US 4,332,963 · App. 06/262,157
Selective production of phenylene diacetate
Inventors:
James E. Lyons, Chao-Yang Hsu
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: May 11, 1981
Inventors
James E. Lyons
Chao-Yang Hsu
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.