Granted Patent
Utility
US 5,573,881 · App. 08/476,042
Toner composition for electrophotography
Inventors:
Shoji Kawasaki, Nobuhiro Hirayama, Kenji Uchiyama, Hisatomo Sato, Hiromi Akiyama, Katuo Uramoto
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Jun 7, 1995
Inventors
Shoji Kawasaki
Nobuhiro Hirayama
Kenji Uchiyama
Hisatomo Sato
Hiromi Akiyama
Katuo Uramoto
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.