Granted Patent
Utility
US 4,800,028 · App. 07/069,910
Polymers and lubricant additives of alkylene dithiothiadiazoles and alkylene cyanodithioimidocarbonates
Inventor:
Sameeh S. Toukan
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Jul 6, 1987
Inventor
Sameeh S. Toukan
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.