Granted Patent
Utility
US 5,018,355 · App. 07/398,910
Method and apparatus for periodic chemical cleanings of turbines
Inventor:
Charles D. Foster
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Aug 28, 1989
Inventor
Charles D. Foster
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.