Granted Patent
Utility
US 5,009,807 · App. 07/563,133
Niobium-activated yttrium tantalate x-ray phosphor with improved brightness and method of making same
Inventor:
V. Butchi Reddy
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Aug 6, 1990
Inventor
V. Butchi Reddy
Assignee (at issue)
GTE Products Corporation
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.