Granted Patent
Utility
US 4,886,700 · App. 07/088,748
Laminated composite of a rigid polyurethane modified polyisocyanurate substrate and metal, plastic, cellulose, glass, ceramic or combinations thereof
Inventor:
Usama E. Younes
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Aug 24, 1987
Inventor
Usama E. Younes
Assignee (at issue)
Arco Chemical Technology, L.P.
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.