Granted Patent
Utility
US 5,091,112 · App. 07/495,090
Reducing copper corrosiveness of organic sulfides
Inventors:
Edmund F. Perozzi, John F. Sieberth
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Mar 19, 1990
Inventors
Edmund F. Perozzi
John F. Sieberth
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.