Granted Patent
Utility
US 6,009,840 · App. 09/032,842
Method for operating a boiler plant
Inventors:
Jurgen Haumann, Hans Peter Knopfel, Thomas Sattlemayer
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Mar 2, 1998
Inventors
Jurgen Haumann
Hans Peter Knopfel
Thomas Sattlemayer
Assignee (at issue)
ABB RESEARCH LTD.
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.