Granted Patent
Utility
US 5,164,466 · App. 07/505,826
Poly(aryl ether sulfone) compositions
Inventors:
M. Jamal El-Hibri, Barry L. Dickinson, Marvin E. Sauers
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Apr 6, 1990
Inventors
M. Jamal El-Hibri
Barry L. Dickinson
Marvin E. Sauers
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.