Granted Patent
Utility
US 5,447,823 · App. 08/070,664
Metal chelate compound and optical recording medium using the compound
Inventors:
Tameichi Ochiai, Yutaka Kurose, Takumi Nagao, Takako Tsukahara, Satoru Imamura
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Jun 2, 1993
Inventors
Tameichi Ochiai
Yutaka Kurose
Takumi Nagao
Takako Tsukahara
Satoru Imamura
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.