Granted Patent
Utility
US 4,044,082 · App. 05/425,090
Multiple extrusion of polycrystalline extrudates
Inventor:
King H. Rosette
Patented Case
View Patent ↗
Granted: Aug 23, 1977
Filed: Dec 17, 1973
Inventor
King H. Rosette
Assignee (at issue)
The Harshaw Chemical 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.