Granted Patent
Utility
US 4,306,548 · App. 05/780,142
Lightweight porous casts
Inventor:
Joseph A. Cogliano
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Mar 22, 1977
Inventor
Joseph A. Cogliano
Assignee (at issue)
W. R. Grace & Co.
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.