Granted Patent
Utility
US 6,089,390 · App. 08/922,453
Tamper evident closure
Inventors:
Rodney Druitt, Charles Martin Tansey
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Sep 3, 1997
Inventors
Rodney Druitt
Charles Martin Tansey
Assignee (at issue)
Closures and Packaging Services Limited
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.