Granted Patent
Utility
US 4,281,980 · App. 06/113,437
Expansion deformable extrusion die blade
Inventors:
John C. Hoagland, Peter H. Farmer, Rocco Carabetta
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Jan 18, 1980
Inventors
John C. Hoagland
Peter H. Farmer
Rocco Carabetta
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.