Granted Patent
Utility
US 5,200,205 · App. 07/690,277
Extruder barrel temperature regulation apparatus
Inventors:
Siegfried Wissmann, Christopher P. Surface
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Apr 24, 1991
Inventors
Siegfried Wissmann
Christopher P. Surface
Assignee (at issue)
Cincinnatti Milacron 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.