Granted Patent
Utility
US 4,466,640 · App. 06/290,038
Pullout resistant pipe coupling
Inventor:
James J. Van Houtte
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Aug 5, 1981
Inventor
James J. Van Houtte
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.