Granted Patent
Utility
US 4,453,352 · App. 06/410,153
Refractory brick with expansion allowance
Inventors:
Jim Allen, Jacques MARTINET
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Aug 18, 1982
Inventors
Jim Allen
Jacques MARTINET
Assignee (at issue)
Kaiser Aluminum & Chemical Corporation
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.