Granted Patent
Utility
US 5,608,092 · App. 08/369,147
1,4,4.sub.a 5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoan-thraquinone derivative(s)
Inventors:
Kimio Hamamura, Chiaki Seki, Masayuki Konishi
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Jan 5, 1995
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.