Granted Patent
Utility
US 6,530,607 · App. 09/707,278
Two-step threaded connector having differential thread width
Inventors:
David Llewellyn Mallis, Robert S. Sivley, IV
Patented Case
View Patent ↗
Granted: Mar 11, 2003
Filed: Nov 6, 2000
Inventors
David Llewellyn Mallis
Robert S. Sivley, IV
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.