Granted Patent
Utility
US 5,279,915 · App. 07/452,370
Toner composition for electrophotography
Inventors:
Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa, Masaaki Shin
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Dec 19, 1989
Inventors
Kazuo Hagiwara
Akira Misawa
Kazuo Hisamatsu
Keiichi Ishikawa
Masaaki Shin
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.