Granted Patent
Utility
US 5,918,673 · App. 08/850,496
Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
Inventors:
Samuel P. Hawkins, III, Donald E. Mosing, David L. Sipos, Keith T. Lutgring, Burney J. Latiolais, Jr.
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: May 2, 1997
Inventors
Samuel P. Hawkins, III
Donald E. Mosing
David L. Sipos
Keith T. Lutgring
Burney J. Latiolais, Jr.
Assignee (at issue)
FRANK'S INTERNATIONAL, 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.