Granted Patent
Utility
US 6,571,994 · App. 10/017,187
Closure having rotatable spout and axially movable stem
Inventors:
Brian M. Adams, Mike Ma
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Dec 12, 2001
Inventors
Brian M. Adams
Mike Ma
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.