Granted Patent
Utility
US 6,720,123 · App. 10/066,614
Process for producing toner for developing electrostatic image
Inventors:
Yuqing Xu, Kazuo Mitsuhashi, Tomohiko Tokunaga, Toyomasa Hoshino
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Feb 6, 2002
Inventors
Yuqing Xu
Kazuo Mitsuhashi
Tomohiko Tokunaga
Toyomasa Hoshino
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
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.