Granted Patent
Utility
US 5,816,505 · App. 08/842,860
Fluid jet decoking tool
Inventors:
Richard Tran, Robert M. Purton
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Apr 17, 1997
Inventors
Richard Tran
Robert M. Purton
Assignee (at issue)
Ingersoll-Dresser Pump Company
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.