Granted Patent
Utility
US 4,722,991 · App. 06/866,439
Phenol-formaldehyde-furfuryl alcohol resins
Inventor:
David R. Armbruster
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: May 23, 1986
Inventor
David R. Armbruster
Assignee (at issue)
Acme Resin Corp.
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.