Granted Patent
Utility
US 5,412,124 · App. 08/280,550
Preparation process of naphthoquinone derivative and intermediate for the preparation thereof
Inventors:
Kimio Hamamura, Chiaki Seki, Masayuki Konishi
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Jul 26, 1994
Inventors
Kimio Hamamura
Chiaki Seki
Masayuki Konishi
Assignee (at issue)
Eisai Chemical 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.