Granted Patent
Utility
US 5,074,323 · App. 07/486,093
Hydrocleaning of the exterior surface of a pipeline to remove coatings
Inventors:
Gordon R. Chapman, Charles M. Reid, James B. Seale, Donald R. Andruik
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Feb 28, 1990
Inventors
Gordon R. Chapman
Charles M. Reid
James B. Seale
Donald R. Andruik
Assignee (at issue)
Cups Unlimited, LLC
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.