Granted Patent
Utility
US 5,897,812 · App. 08/975,116
Doped amorphous and crystalline gallium oxides alkaline earth gallates and doped zinc germanate phosphors as electroluminescent materials
Inventors:
Adrian Kitai, Tian Xiao, Guo Liu
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Nov 20, 1997
Inventors
Adrian Kitai
Tian Xiao
Guo Liu
Assignee (at issue)
Adrian H. Kitai
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.