Granted Patent
Utility
US 5,020,682 · App. 07/431,204
Closure system
Inventor:
Herbert V. Dutt
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: Nov 3, 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.