Granted Patent
Utility
US 4,661,120 · App. 06/754,304
Diesel fuel additive
Inventors:
Richard P. Carr, Marcos Y. Corpuz
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Jul 12, 1985
Inventors
Richard P. Carr
Marcos Y. Corpuz
Assignee (at issue)
Nalco Chemical Company
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.