Granted Patent
Utility
US 4,450,192 · App. 06/402,747
Construction barrier board
Inventor:
Joseph A. Cogliano
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jul 28, 1982
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.