Granted Patent
Utility
US 5,288,835 · App. 08/065,300
Melt processable polyesters and poly(imide-esters)
Inventor:
Robert S. Irwin
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: May 21, 1993
Inventor
Robert S. Irwin
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.