Granted Patent
Utility
US 4,296,950 · App. 06/058,697
Corrosion resistant pipe joint
Inventor:
Richard Chamberlin
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Jul 18, 1979
Inventor
Richard Chamberlin
Assignee (at issue)
Dresser Industries, 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.