Granted Patent
Utility
US 4,249,911 · App. 06/012,428
Combustible fuel composition
Inventors:
Bernard L. Denker, Franklin D. Hoffert
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Feb 15, 1979
Inventors
Bernard L. Denker
Franklin D. Hoffert
Assignee (at issue)
Hydrocarbon Research, Inc.
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.