Granted Patent
Utility
US 5,565,056 · App. 08/440,568
Plural extruder method for making a composite building panel
Inventors:
Herbert J. Lause, Sylvia S. Moore, Daniel W. King
Patented Case
View Patent ↗
Granted: Oct 15, 1996
Filed: May 15, 1995
Inventors
Herbert J. Lause
Sylvia S. Moore
Daniel W. King
Assignee (at issue)
Aluminum Company of America
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.