Granted Patent
Utility
US 4,835,911 · App. 07/137,717
Methods of making steel abrading elements for mass finishing of workpieces and for using same
Inventors:
Roger A. L. Bond, Stephen J. Nigro
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Dec 24, 1987
Inventors
Roger A. L. Bond
Stephen J. Nigro
Assignee (at issue)
THE ABBOTT BALL 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.