Granted Patent
Utility
US 5,166,299 · App. 07/756,577
Polyurethanes comprising the reaction product of an isocyanate prepolymer and isomers of di(methylthio)-diaminotoluene
Inventor:
Christopher J. Nalepa
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Sep 9, 1991
Inventor
Christopher J. Nalepa
Assignee (at issue)
Ethyl 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.