Granted Patent
Utility
US 4,397,946 · App. 06/267,242
Process for preparing androstane steroids
Inventors:
Yukio Imada, Tetsu Osozawa, Yuki Morimoto, Masayuki Kinoshita
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: May 26, 1981
Inventors
Yukio Imada
Tetsu Osozawa
Yuki Morimoto
Masayuki Kinoshita
Assignee (at issue)
Mitsubishi Chemical Industries, 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.