Granted Patent
Utility
US 6,471,933 · App. 08/806,851
Ozone-oxidized carbon black composition with low conductivity and improved color
Inventor:
Anderson O. Dotson, Jr.
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Feb 26, 1997
Inventor
Anderson O. Dotson, Jr.
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.