Granted Patent
Utility
US 4,487,909 · App. 06/538,271
Ternary adhesive systems containing a polyester polyol, an isocyanate-polyester-urethane, and a crosslinking agent which is a polyisocyanate
Inventors:
James E. Coughlin, Eugene G. Sommerfeld, Clifford H. Strolle
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Oct 3, 1983
Inventors
James E. Coughlin
Eugene G. Sommerfeld
Clifford H. Strolle
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.