Granted Patent
Utility
US 4,198,032 · App. 05/879,352
Bottom operable tank car lading valve assembly which does not require a skid
Inventors:
David P. Hillstead, Robert W. Randolph, Gunter R. Behle
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: Feb 21, 1978
Inventors
David P. Hillstead
Robert W. Randolph
Gunter R. Behle
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.