Granted Patent
Utility
US 4,286,524 · App. 06/071,968
Pressurized hopper car interior side and roof bracing support structure
Inventor:
Steve L. Jantzen
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Sep 4, 1979
Inventor
Steve L. Jantzen
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.