Granted Patent
Utility
US 5,159,028 · App. 07/700,489
Process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers)
Inventors:
Markus Matzner, George T. Kwiatkowski, Robert A. Clendinning, Selvaraj Savariar, Mohammad Jamal El-Hibri, Charles N. Merriam, Robert J. Cotter
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: May 15, 1991
Inventors
Markus Matzner
George T. Kwiatkowski
Robert A. Clendinning
Selvaraj Savariar
Mohammad Jamal El-Hibri
Charles N. Merriam
Robert J. Cotter
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.