Granted Patent
Utility
US 4,917,253 · App. 07/330,648
Container-closure with fold over projections
Inventor:
Herbert V. Dutt
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Mar 30, 1989
Inventor
Herbert V. Dutt
Assignee (at issue)
Continental Plastic Corp.
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.