Granted Patent
Utility
US 4,851,480 · App. 07/060,038
Extrusion-grade compositions comprising mixtures of wholly aromatic polyesters
Inventors:
Nathan D. Field, Joseph J. Duska
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Jun 9, 1987
Inventors
Nathan D. Field
Joseph J. Duska
Assignee (at issue)
Amoco Corporation
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.