Granted Patent
Utility
US 4,284,415 · App. 06/092,383
Additives for hydrocarbon oils
Inventors:
Gary W. Y. Kwong, Joseph Levy
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Nov 8, 1979
Inventors
Gary W. Y. Kwong
Joseph Levy
Assignee (at issue)
UOP LLC
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.