Granted Patent
Utility
US 4,040,264 · App. 05/635,843
Controlled buoyancy underwater riser system
Inventor:
Claude R. Neilon
Patented Case
View Patent ↗
Granted: Aug 9, 1977
Filed: Nov 28, 1975
Inventor
Claude R. Neilon
Assignee (at issue)
Armco Steel Company, L.P.
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.