Granted Patent
Utility
US 4,819,247 · App. 07/116,171
Glass melt furnace
Inventors:
Stephen Seng, Frank J. Macdonald
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Nov 3, 1987
Inventors
Stephen Seng
Frank J. Macdonald
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.