Granted Patent
Utility
US 5,739,321 · App. 08/655,785
3-hydroxy .gamma.-lactone based enantionselective synthesis of azetidinones
Inventors:
Guang-Zhong Wu, Xing Chen, Yee-Shing Wong, Doris P. Schumacher, Martin Steinman
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: May 31, 1996
Inventors
Guang-Zhong Wu
Xing Chen
Yee-Shing Wong
Doris P. Schumacher
Martin Steinman
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.