Granted Patent
Utility
US 4,540,839 · App. 06/593,378
Process for the production of polymer gasoline
Inventors:
Donald A. Keyworth, Cecil G. McFarland
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Mar 26, 1984
Inventors
Donald A. Keyworth
Cecil G. McFarland
Assignee (at issue)
Petro-Tex Chemical 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.