Granted Patent
Utility
US 4,597,447 · App. 06/609,506
Diverter/bop system and method for a bottom supported offshore drilling rig
Inventors:
Joseph R. Roche, Gabriel G. Alexander, William L. Carbaugh
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: May 11, 1984
Inventors
Joseph R. Roche
Gabriel G. Alexander
William L. Carbaugh
Assignee (at issue)
Hydril 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.