Granted Patent
Utility
US 6,716,021 · App. 09/923,974
Crosshead extrusion system
Inventors:
Joseph C. Worley, Gene L. Patterson
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Aug 7, 2001
Inventors
Joseph C. Worley
Gene L. Patterson
Assignee (at issue)
Dayco Products, LLC
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.