Granted Patent
Utility
US 4,609,714 · App. 06/650,100
Blends of poly(aryl ketones)
Inventors:
James E. Harris, Lloyd M. Robeson
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Sep 14, 1984
Inventors
James E. Harris
Lloyd M. Robeson
Assignee (at issue)
Union Carbide 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.