Granted Patent
Utility
US 4,157,898 · App. 05/896,269
Fused aluminum oxide abrasive grain containing reduced titanium oxide
Inventors:
Thomas B. Walker, Robert J. Seider, Paul Cichy
Patented Case
View Patent ↗
Granted: Jun 12, 1979
Filed: Apr 14, 1978
Inventors
Thomas B. Walker
Robert J. Seider
Paul Cichy
Assignee (at issue)
Carborundum 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.