Granted Patent
Utility
US 4,588,439 · App. 06/736,017
Oxygen containing permanent magnet alloy
Inventors:
Kalathur S. Narasimhan, Carol J. Willman, Edward J. Dulis
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: May 20, 1985
Inventors
Kalathur S. Narasimhan
Carol J. Willman
Edward J. Dulis
Assignee (at issue)
Crucible Materials 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.