Granted Patent
Utility
US 4,930,137 · App. 07/268,736
Inorganic triple point screen
Inventors:
Edward G. Sergoyan, Michael von Dadelszen
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Nov 8, 1988
Inventors
Edward G. Sergoyan
Michael von Dadelszen
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.