Granted Patent
Utility
US 4,756,901 · App. 06/943,029
Purification of (Nb.sub.1-x Ta.sub.x).sub.2 O.sub.5
Inventors:
Ricardo C. Pastor, Luisa E. Gorre
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Dec 18, 1986
Inventors
Ricardo C. Pastor
Luisa E. Gorre
Assignee (at issue)
Hughes Aircraft 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.