Granted Patent
Utility
US 4,684,554 · App. 06/722,822
Polymeric coating for container induction innerseal
Inventor:
David T. Ou-Yang
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Apr 12, 1985
Inventor
David T. Ou-Yang
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.