Granted Patent
Utility
US 4,661,414 · App. 06/713,889
Multi-layer flexible packaging material
Inventor:
Gregg D. Kowalski
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Mar 20, 1985
Inventor
Gregg D. Kowalski
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.