Granted Patent
Utility
US 5,459,006 · App. 08/350,564
Quaternary phosphonium tetrahaloferrate salts as charge-control agents for toners
Inventors:
John C. Wilson, Dinesh Tyagi
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Dec 7, 1994
Inventors
John C. Wilson
Dinesh Tyagi
Assignee (at issue)
EASTMAN KODAK COMPANY
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.