Granted Patent
Utility
US 4,970,024 · App. 07/459,891
Niobium-activated yttrium tantalate x-ray phosphor with improved brightness and method for making the same
Inventor:
V. Butchi Reddy
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Jan 2, 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.