Granted Patent
Utility
US 6,416,921 · App. 09/814,923
Method for forming toner particles having controlled morphology and containing a quaternary ammonium tetraphenylborate and a polymeric phosphonium salt
Inventors:
John C. Wilson, Matthew Ezenyilimba, Gretchen S. McGrath
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Mar 22, 2001
Inventors
John C. Wilson
Matthew Ezenyilimba
Gretchen S. McGrath
Assignee (at issue)
Heidelberg Digital L.L.C.
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.