Granted Patent
Utility
US 5,692,785 · App. 08/626,024
Plastic pipe coupler with internal sealer
Inventors:
Donald W. Wartluft, Timothy F. Wood
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Apr 1, 1996
Inventors
Donald W. Wartluft
Timothy F. Wood
Assignee (at issue)
Continental 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.