Granted Patent
Utility
US 6,402,428 · App. 09/576,364
Pipeline recovery tool
Inventors:
Ziba Morisi, Raymond J. Serpas, Kevin Patrick Zaeringer, Dennis E. Calkins
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: May 22, 2000
Inventors
Ziba Morisi
Raymond J. Serpas
Kevin Patrick Zaeringer
Dennis E. Calkins
Assignee (at issue)
J. Ray McDermott, S.A.
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.