Granted Patent
Utility
US 6,352,120 · App. 09/496,867
Packer insert for sealing on multiple items in the wellbore
Inventor:
William L. Carbaugh
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Feb 2, 2000
Inventor
William L. Carbaugh
Assignee (at issue)
Hydril Company
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.