Granted Patent
Utility
US 5,863,416 · App. 08/734,056
Method to vapor-phase deliver heater antifoulants
Inventor:
Harald LEMKE
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Oct 18, 1996
Inventor
Harald LEMKE
Assignee (at issue)
Nalco/Exxon Energy Chemicals, L.P.
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.