Granted Patent
Utility
US 4,244,900 · App. 06/024,237
Method for the continuous production of a co-extruded heat-shrinkable composite foamed resin sheet
Inventor:
James E. Heider
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Mar 26, 1979
Inventor
James E. Heider
Assignee (at issue)
Owens-Illinois Inc.
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.