Granted Patent
Utility
US 4,525,001 · App. 06/458,154
Pipe connector with interengagable tubular pin and tubular box members
Inventors:
Norman Lumsden, Brian K. Phillips
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Jan 14, 1983
Inventors
Norman Lumsden
Brian K. Phillips
Assignee (at issue)
Hunting Oilfield Services (UK) Ltd.
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.