Granted Patent
Utility
US 5,439,633 · App. 08/281,230
Plastic extruder having a mixing valve with automatic shut-off
Inventors:
Michael F. Durina, Shawn P. Bodnar, Timothy W. Womer
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Jul 27, 1994
Inventors
Michael F. Durina
Shawn P. Bodnar
Timothy W. Womer
Assignee (at issue)
Spirex 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.