Granted Patent
Utility
US 4,212,333 · App. 05/967,107
Quick fill/empty tank car system
Inventor:
Robert W. Randolph
Patented Case
View Patent ↗
Granted: Jul 15, 1980
Filed: Dec 7, 1978
Inventor
Robert W. Randolph
Assignee (at issue)
ACF Industries Incorporated
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.