Granted Patent
Utility
US 5,975,321 · App. 09/071,625
Snap-on, screw-off cap with tamper-evidencing skirt and container neck
Inventor:
Daniel Luch
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: May 1, 1998
Inventor
Daniel Luch
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.