Granted Patent
Utility
US 4,740,238 · App. 07/030,334
Platelet-containing tantalum powders
Inventor:
Edward K. Schiele
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Mar 26, 1987
Inventor
Edward K. Schiele
Assignee (at issue)
Fansteel Inc.
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.