Granted Patent
Utility
US 4,771,712 · App. 07/065,757
Combustion of fuel containing alkalines
Inventors:
Folke Engstrom, Erkki Kiiskila, Pekka Tormikoski
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Jun 24, 1987
Inventors
Folke Engstrom
Erkki Kiiskila
Pekka Tormikoski
Assignee (at issue)
A. Ahlstrom Corporation
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.