Granted Patent
Utility
US 6,253,940 · App. 09/301,282
Tamper-indicating closure and method of manufacture
Inventors:
Paul R. Graham, Charles A. Webster, James L. Gregory
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Apr 28, 1999
Inventors
Paul R. Graham
Charles A. Webster
James L. Gregory
Assignee (at issue)
Owens-Illinois Closure Inc.
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.