Granted Patent
Utility
US 5,277,242 · App. 07/956,174
Pipe casting machine having improved pipe mold stabling rings
Inventor:
Merrill D. Arrington
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Oct 5, 1992
Inventor
Merrill D. Arrington
Assignee (at issue)
AMERICAN Cast Iron Pipe 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.