Granted Patent
Utility
US 4,255,344 · App. 06/085,639
9-.alpha.-Hydroxy steroids
Inventors:
Yukio Imada, Sumiko Mizuno
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Oct 17, 1979
Inventors
Yukio Imada
Sumiko Mizuno
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.