Granted Patent
Utility
US 5,215,547 · App. 07/756,578
Middle distillate fuels and additives therefor
Inventors:
John G. Bostick, Lawrence J. Cunningham
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Sep 9, 1991
Inventors
John G. Bostick
Lawrence J. Cunningham
Assignee (at issue)
Ethyl Petroleum Additives, 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.