Granted Patent
Utility
US 4,332,543 · App. 06/187,105
Extrusion die with melt flow control
Inventors:
John L. Fulton, Harold H. Hopfe
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Sep 15, 1980
Inventors
John L. Fulton
Harold H. Hopfe
Assignee (at issue)
Monsanto Company
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.