Granted Patent
Utility
US 4,957,541 · App. 07/265,498
Capacitor grade tantalum powder
Inventors:
Terrance B. Tripp, Richard Hildreth
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Nov 1, 1988
Inventors
Terrance B. Tripp
Richard Hildreth
Assignee (at issue)
NRC CORPORATION
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.