Granted Patent
Utility
US 6,311,704 · App. 09/519,065
Methods and apparatus for chemically cleaning turbines
Inventor:
Charles D. Foster
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Mar 3, 2000
Inventor
Charles D. Foster
Assignee (at issue)
HydroChem Industrial Services, 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.