Granted Patent
Utility
US 5,551,665 · App. 08/236,787
Ball valve with coiled tubing cutting ability
Inventors:
Timothy J. Noack, Wesley R. Allred
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Apr 29, 1994
Inventors
Timothy J. Noack
Wesley R. Allred
Assignee (at issue)
Halliburton
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.