Granted Patent
Utility
US 5,925,789 · App. 09/055,480
Asymmetric synthesis of benzoxazinones
Inventors:
Michael E. Pierce, Cheng-Yi Chen, Anusuya Choudhury, Lilian A. Radesca, Lushi Tan, Dalian Zhao
Patented Case
View Patent ↗
Granted: Jul 20, 1999
Filed: Apr 6, 1998
Inventors
Michael E. Pierce
Cheng-Yi Chen
Anusuya Choudhury
Lilian A. Radesca
Lushi Tan
Dalian Zhao
Assignee (at issue)
Dupont Pharmaceuticals
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.