Granted Patent
Utility
US 6,568,563 · App. 09/930,024
Closure having well with removable membrane
Inventors:
Mike Ma, Brian M. Adams, Alan W. Kieler
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Aug 14, 2001
Inventors
Mike Ma
Brian M. Adams
Alan W. Kieler
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.