Granted Patent
Utility
US 4,594,213 · App. 06/654,217
Reduction elimination of bubble formation when extruding granular polyolefins
Inventor:
George E. Ealer
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Sep 25, 1984
Inventor
George E. Ealer
Assignee (at issue)
Union Carbide Corporation
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.