Granted Patent
Utility
US 4,996,284 · App. 07/342,170
Novel epoxy sulfonamide-based resins, a process for their preparation and use of same
Inventor:
Leo X. Mallavarapu
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Apr 24, 1989
Inventor
Leo X. Mallavarapu
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.