Granted Patent
Utility
US 4,423,700 · App. 06/343,078
Apparatus for coating plastic pipe
Inventors:
Minh Dang Nguyen, Charles Lostak
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Jan 27, 1982
Inventors
Minh Dang Nguyen
Charles Lostak
Assignee (at issue)
J. & M. Manufacturing Co., 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.