Granted Patent
Utility
US 4,250,046 · App. 06/017,218
Diethanol disulfide as an extreme pressure and anti-wear additive in water soluble metalworking fluids
Inventor:
John L. Przybylinski
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Mar 5, 1979
Inventor
John L. Przybylinski
Assignee (at issue)
Pennwalt 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.