Granted Patent
Utility
US 6,425,721 · App. 09/607,821
Method of forming a safety can end
Inventor:
Edgar H. Zysset
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Jun 30, 2000
Inventor
Edgar H. Zysset
Assignee (at issue)
Crown Cork & Seal Technologies Corporation
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.