Granted Patent
Utility
US 6,802,372 · App. 10/208,724
Apparatus for releasing a ball into a wellbore
Inventor:
Marcel Budde
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Jul 30, 2002
Inventor
Marcel Budde
Assignee (at issue)
Weatherford/Lamb, 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.