Granted Patent
Utility
US 6,302,199 · App. 09/559,241
Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells
Inventors:
Samuel P. Hawkins, III, Burney J. Latiolais, Jr., Keith T. Lutgring
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: Apr 26, 2000
Inventors
Samuel P. Hawkins, III
Burney J. Latiolais, Jr.
Keith T. Lutgring
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.