Granted Patent
Utility
US 5,823,391 · App. 08/707,564
Dual chamber flexible tube dispensing package and method of making
Inventors:
Christian W. Klauke, Igor F. Beaufils
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Sep 4, 1996
Inventors
Christian W. Klauke
Igor F. Beaufils
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.