Granted Patent
Utility
US 6,725,911 · App. 09/966,999
Corrosion resistance treatment of condensing heat exchanger steel structures exposed to a combustion environment
Inventors:
Palitha Jayaweera, Angel Sanjurjo, Kai-Hung Lau
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Sep 28, 2001
Inventors
Palitha Jayaweera
Angel Sanjurjo
Kai-Hung Lau
Assignee (at issue)
Gas Research Institute
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.