Granted Patent
Utility
US 5,457,136 · App. 08/288,616
Thermal foam insulation
Inventors:
G. Robert Hartranft, Ronald S. Lenox, Dean L. Putt, Joseph F. Remar, Donald M. Snyder
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Aug 10, 1994
Inventors
G. Robert Hartranft
Ronald S. Lenox
Dean L. Putt
Joseph F. Remar
Donald M. Snyder
Assignee (at issue)
ARMSTRONG WORLD INDUSTRIES, 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.