Granted Patent
Utility
US 5,886,200 · App. 08/881,811
Process for the preparation of 17-esters of 9 .alpha., 21-dihalo-pregnane-11 .beta., 17 .alpha.-diol-20-ones
Inventors:
Daw-Iong Kwok, David Jieh-Shyh Tsai, Chou-Hong Tann, Xiaoyong Fu
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jun 25, 1997
Inventors
Daw-Iong Kwok
David Jieh-Shyh Tsai
Chou-Hong Tann
Xiaoyong Fu
Assignee (at issue)
SCHERING CORPORATION
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.