Granted Patent
Utility
US 5,567,480 · App. 08/351,700
Coal tar enamel coated steel pipe and process for producing same
Inventors:
John R. Johnson, William R. Roder, C. Sherill Henegar
Patented Case
View Patent ↗
Granted: Oct 22, 1996
Filed: Dec 8, 1994
Inventors
John R. Johnson
William R. Roder
C. Sherill Henegar
Assignee (at issue)
Reilly 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.