Granted Patent
Utility
US 4,491,598 · App. 06/464,691
Package having oil-containing product
Inventors:
Joseph C. Hsu, Robert A. Steen
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Feb 7, 1983
Inventors
Joseph C. Hsu
Robert A. Steen
Assignee (at issue)
American Can 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.