Granted Patent
Utility
US 4,990,433 · App. 07/378,041
Metal-containing indoaniline compound and optical recording medium employing the compound
Inventors:
Katsuhira Yoshida, Yuji Kubo
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Jul 11, 1989
Inventors
Katsuhira Yoshida
Yuji Kubo
Assignee (at issue)
Mitsubishi Kasei 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.