Granted Patent
Utility
US 4,340,557 · App. 06/216,747
Method of making unfestooned plastic containers from polygonal blanks
Inventor:
Robert Mark GROSS
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Dec 16, 1980
Inventor
Robert Mark GROSS
Assignee (at issue)
BALL CORPORATION
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.