Granted Patent
Utility
US 4,329,313 · App. 06/206,146
Apparatus and method for extruding ethylene polymers
Inventors:
John C. Miller, Archibald L. Burnett
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Nov 12, 1980
Inventors
John C. Miller
Archibald L. Burnett
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.