Granted Patent
Utility
US 4,425,749 · App. 06/330,285
Furnace lining module
Inventor:
William H. Parker
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Dec 14, 1981
Inventor
William H. Parker
Assignee (at issue)
Manville Service 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.