Granted Patent
Utility
US 5,279,779 · App. 07/784,565
High alumina insulating refractory product and method for making same
Inventor:
Lawrence D. Fitch
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Oct 29, 1991
Inventor
Lawrence D. Fitch
Assignee (at issue)
Indresco 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.