Granted Patent
Utility
US 6,769,291 · App. 10/370,225
Knock-out pressure test cap with breakaway nipple plug
Inventors:
Frank D. Julian, Duane R. Condon
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Feb 19, 2003
Inventors
Frank D. Julian
Duane R. Condon
Assignee (at issue)
Sioux Chief Mfg. Co., 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.