Granted Patent
Utility
US 5,776,239 · App. 08/918,702
Hydrothermal process for making ultafine metal oxide powders
Inventor:
Salvatore A. Bruno
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Aug 22, 1997
Inventor
Salvatore A. Bruno
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.