Granted Patent
Utility
US 4,898,243 · App. 07/147,533
Liner and drill pipe assembly
Inventors:
Hiram E. Lindsey, Jr., Paul W. Cole
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Jan 25, 1988
Inventors
Hiram E. Lindsey, Jr.
Paul W. Cole
Assignee (at issue)
Lindsey Completion Systems, Inc.
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.