Granted Patent
Utility
US 4,812,380 · App. 07/134,399
Electrostatographic toners and developers containing new charge-control agents
Inventors:
Douglas E. Bugner, Peter S. Alexandrovich
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Dec 17, 1987
Inventors
Douglas E. Bugner
Peter S. Alexandrovich
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.