Granted Patent
Utility
US 4,891,167 · App. 07/167,034
Block polymers containing a poly(aryl ether ketone) and methods for their production
Inventors:
Robert A. Clendinning, James E. Harris, Donald R. Kelsey, Markus Matzner, Lloyd M. Robeson, Paul A. Winslow, Louis M. Maresca
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Mar 11, 1988
Inventors
Robert A. Clendinning
James E. Harris
Donald R. Kelsey
Markus Matzner
Lloyd M. Robeson
Paul A. Winslow
Louis M. Maresca
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.