Granted Patent
Utility
US 4,971,881 · App. 07/293,805
Toner composition comprising rosin modified styrene acrylic resin
Inventors:
Gary L. Deets, Richard Zielinski
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Jan 5, 1989
Inventors
Gary L. Deets
Richard Zielinski
Assignee (at issue)
Monsanto 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.