Granted Patent
Utility
US 4,912,192 · App. 06/758,561
Polyarylnitrile polymers and a method for their production
Inventors:
Louis M. Maresca, Alford G. Farnham, Thomas H. Schwab, Ulrich Steiner
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jul 23, 1985
Inventors
Louis M. Maresca
Alford G. Farnham
Thomas H. Schwab
Ulrich Steiner
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.