Granted Patent
Utility
US 5,265,332 · App. 07/986,832
Caster shell surface coating method
Inventor:
Warren C. Hartz
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Dec 8, 1992
Inventor
Warren C. Hartz
Assignee (at issue)
NORANDAL USA, 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.