Granted Patent
Utility
US 5,363,106 · App. 08/035,261
Method for evaluating internal quality of fused cast refractories
Inventors:
Yutaka Hosoda, Yukihiro Ushimaru, Akinori Samejima
Patented Case
View Patent ↗
Granted: Nov 8, 1994
Filed: Mar 22, 1993
Inventors
Yutaka Hosoda
Yukihiro Ushimaru
Akinori Samejima
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.