Granted Patent
Utility
US 5,687,571 · App. 08/596,770
Combustion chamber with two-stage combustion
Inventors:
Rolf Althaus, Jakob Keller
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Feb 5, 1996
Inventors
Rolf Althaus
Jakob Keller
Assignee (at issue)
Asea Brown Boveri, S.A.
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.