Granted Patent
Utility
US 5,676,540 · App. 08/618,233
Flue walls using interlocking bricks
Inventors:
Alfred T. Williams, Dennis J. Haines, Robert F. Corcoran, Jr., R. Kelly McClara, Timothy W. Kempf
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Mar 19, 1996
Inventors
Alfred T. Williams
Dennis J. Haines
Robert F. Corcoran, Jr.
R. Kelly McClara
Timothy W. Kempf
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.