Granted Patent
Utility
US 5,114,438 · App. 07/605,283
Abrasive article
Inventors:
Dennis D. Leatherman, James J. McGinley, Daniel E. Adams, George A. Brons
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Oct 29, 1990
Inventors
Dennis D. Leatherman
James J. McGinley
Daniel E. Adams
George A. Brons
Assignee (at issue)
PPG Industries, Inc.
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.