Granted Patent
Utility
US 4,572,885 · App. 06/395,965
Developer composition for developing an electrostatic image
Inventors:
Keiji Sato, Takahira Kasuya, Goichi Yamakawa, Tsuneo Wada
Patented Case
View Patent ↗
Granted: Feb 25, 1986
Filed: Jul 7, 1982
Inventors
Keiji Sato
Takahira Kasuya
Goichi Yamakawa
Tsuneo Wada
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.