Granted Patent
Utility
US 5,088,613 · App. 07/660,640
Tamper evident closure
Inventors:
Herbert V. Dutt, Thomas F. Hudak
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Feb 25, 1991
Inventors
Herbert V. Dutt
Thomas F. Hudak
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.