Granted Patent
Utility
US 4,721,132 · App. 07/011,163
Subsea flowline quick disconnect coupling
Inventor:
Robert C. Houlgrave
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Feb 4, 1987
Inventor
Robert C. Houlgrave
Assignee (at issue)
Hughes Tool Company LLC
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.