Granted Patent
Utility
US 4,323,500 · App. 06/240,949
Method for preparing 7.alpha.-acylthio-4-en-3-oxosteroids
Inventors:
Hiromi Okushima, Shinichiro Fujimori, Rikizo Furuya, Shuzo Hayakawa
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Mar 5, 1981
Inventors
Hiromi Okushima
Shinichiro Fujimori
Rikizo Furuya
Shuzo Hayakawa
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.