Granted Patent
Utility
US 4,990,307 · App. 07/171,775
Method for producing particles for the production of permanent magnets
Inventor:
Floyd E. Camp
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Mar 22, 1988
Inventor
Floyd E. Camp
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.