Granted Patent
Utility
US 5,881,802 · App. 08/952,069
Refractory shield design for superheater tubes
Inventor:
Kenneth E. Green
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Mar 9, 1998
Inventor
Kenneth E. Green
Assignee (at issue)
Saint-Gobain Industrial Ceramics, 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.