Granted Patent
Utility
US 4,965,038 · App. 07/407,593
Laminated composite of a rigid polyurethane modified polyisocyanurate substrate an metal, plastic, cellulose, glass, ceramic or combinations thereof
Inventor:
Usama E. Younes
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Sep 15, 1989
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.