Granted Patent
Utility
US 4,657,153 · App. 06/799,328
Tamper-evident closure
Inventor:
Thomas H. Hayes
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Nov 18, 1985
Inventor
Thomas H. Hayes
Assignee (at issue)
ANCHOR HOCKING, LLC
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.