Granted Patent
Utility
US 4,487,884 · App. 06/488,893
Aqueous solution of cationic thermosetting resin from N-bis(aminopropyl)methylamine/oxalic acid
Inventor:
William W. Maslanka
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Apr 27, 1983
Inventor
William W. Maslanka
Assignee (at issue)
HERCULES 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.