Granted Patent
Utility
US 5,122,315 · App. 07/516,432
Method and appparatus for monitoring and controlling thermoplastic extruder output
Inventor:
Dana G. Darley
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Apr 30, 1990
Inventor
Dana G. Darley
Assignee (at issue)
Luwa, 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.