Granted Patent
Utility
US 4,383,077 · App. 06/328,753
Dicyandiamide-formaldehyde condensates modified with urea and process for preparing the same
Inventor:
Ralph A. Bankert
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Dec 8, 1981
Inventor
Ralph A. Bankert
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.