Granted Patent
Utility
US 5,202,212 · App. 07/919,387
Toner composition for electrophotography
Inventors:
Masaaki Shin, Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Jul 29, 1992
Inventors
Masaaki Shin
Kazuo Hagiwara
Akira Misawa
Kazuo Hisamatsu
Keiichi Ishikawa
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.