Granted Patent
Utility
US 6,506,247 · App. 09/996,291
Low silica furnace cement
Inventor:
Fred R. Scholer
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Nov 28, 2001
Inventor
Fred R. Scholer
Assignee (at issue)
Hercules Chemical Company Incorporated
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.