Granted Patent
Utility
US 4,820,767 · App. 06/674,400
Process for the production of poly(vinyl acetate) and poly(vinyl alcohol)
Inventor:
Tse-Chong Wu
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Nov 23, 1984
Inventor
Tse-Chong Wu
Assignee (at issue)
AlliedSignal, 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.