Granted Patent
Utility
US 6,177,041 · App. 09/172,721
Method for forming cap with tear line
Inventor:
Steven H. Bietzer
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Oct 13, 1998
Inventor
Steven H. Bietzer
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.