Granted Patent
Utility
US 4,687,752 · App. 06/622,922
Medium weight abrasion-resistant castable
Inventor:
Dennis D. Peters
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Jun 21, 1984
Inventor
Dennis D. Peters
Assignee (at issue)
RESCO PRODUCTS, 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.