Granted Patent
Utility
US 6,027,331 · App. 09/187,343
Burner for operating a heat generator
Inventors:
Klaus Dobbeling, Hans Peter Knopfel, Thomas Ruck
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Nov 6, 1998
Inventors
Klaus Dobbeling
Hans Peter Knopfel
Thomas Ruck
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.