Granted Patent
Utility
US 5,651,613 · App. 08/501,676
Drum with internal static mixer
Inventors:
Harry Mays, Michael A. Morrison
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Jul 12, 1995
Inventors
Harry Mays
Michael A. Morrison
Assignee (at issue)
NORTH AMERICA PACKAGING CORPORATION
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.