Granted Patent
Utility
US 4,837,394 · App. 07/229,043
electrostatographic toner particle comprising a polyester containing a covalently bound quaternary phosphonium salt
Inventors:
Peter S. Alexandrovich, Lawrence P. DeMejo, Thomas A. Jadwin, John C. Wilson
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Aug 5, 1988
Inventors
Peter S. Alexandrovich
Lawrence P. DeMejo
Thomas A. Jadwin
John C. Wilson
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.