Granted Patent
Utility
US 6,030,739 · App. 09/260,011
Electrostatic image developing toner
Inventors:
Tomoko Ishikawa, Noriaki Takahashi, Takayuki Kanai
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Mar 2, 1999
Inventors
Tomoko Ishikawa
Noriaki Takahashi
Takayuki Kanai
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.