Granted Patent
Utility
US 6,192,948 · App. 09/355,819
Tear-open spout for a container
Inventors:
Albert Louis Victor Jozef Claessens, Austin McDonald, Gerhard Liepold, Donald Stollenmaier
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Sep 3, 1999
Inventors
Albert Louis Victor Jozef Claessens
Austin McDonald
Gerhard Liepold
Donald Stollenmaier
Assignee (at issue)
Duras Trading Limited
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.