Granted Patent
Utility
US 6,589,040 · App. 09/774,185
Cutting device for purging an extruder
Inventor:
Frederic Cousin
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Apr 25, 2001
Inventor
Frederic Cousin
Assignee (at issue)
Solvay Polyolefins Europe-Belgium (Societe Anonyme)
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.