Granted Patent
Utility
US 6,139,946 · App. 08/866,799
Magnetic recording media incorporating a quaternary ammonium functional binder and magnetic pigment surface treated with compound having acidic and electron withdrawing functionalities
Inventors:
Joseph Bailey, John S. Roden
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: May 30, 1997
Inventors
Joseph Bailey
John S. Roden
Assignee (at issue)
Imation Corp.
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.