Granted Patent
Utility
US 5,284,531 · App. 08/031,254
Cylindrical metal fibers made from tantalum, columbium, and alloys thereof
Inventor:
James A. Fife
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Mar 10, 1993
Inventor
James A. Fife
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.