Granted Patent
Utility
US 4,850,858 · App. 07/197,510
Disposable liquid fuel burner
Inventors:
Robert J. Blankenship, Robert J. Hamblin
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: May 23, 1988
Inventors
Robert J. Blankenship
Robert J. Hamblin
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.