Granted Patent
Utility
US 4,297,250 · App. 06/110,278
Method of producing homogeneous ZnO non-linear powder compositions
Inventors:
Tapan K. Gupta, Herbert E. Pietsch
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Jan 7, 1980
Inventors
Tapan K. Gupta
Herbert E. Pietsch
Assignee (at issue)
Westinghouse Electric Company LLC
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.