Granted Patent
Utility
US 5,283,940 · App. 07/957,402
Method of forming tamper-evident container and closure by curling
Inventors:
Daniel Luch, Rawson Chenault
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Oct 6, 1992
Inventors
Daniel Luch
Rawson Chenault
Assignee (at issue)
Portola Packaging, 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.