Granted Patent
Utility
US 5,785,121 · App. 08/661,995
Blowout preventer protector and method of using same during oil and gas well stimulation
Inventor:
L. Murray Dallas
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Jun 12, 1996
Inventor
L. Murray Dallas
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.