Granted Patent
Utility
US 6,420,043 · App. 09/632,714
Niobium powders and niobium electrolytic capacitors
Inventors:
James A. Fife, Jane Jia Liu, Roger W. Steele
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Aug 4, 2000
Inventors
James A. Fife
Jane Jia Liu
Roger W. Steele
Assignee (at issue)
Cabot 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.