Granted Patent
Utility
US 6,602,459 · App. 09/961,961
Dual-chamber container, and method and apparatus for its manufacture
Inventors:
Richard R. Johnston, Michael Hsieh
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Sep 24, 2001
Inventors
Richard R. Johnston
Michael Hsieh
Assignee (at issue)
Owens-Brockway Plastic Products 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.