Granted Patent
Utility
US 4,302,172 · App. 06/150,234
Extrusion die assembly
Inventors:
Steven W. Hogseth, Carl W. Loff, Dean J. White
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: May 15, 1980
Inventors
Steven W. Hogseth
Carl W. Loff
Dean J. White
Assignee (at issue)
Leesona 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.