Granted Patent
Utility
US 5,932,749 · App. 08/822,996
Asymmetric synthesis of R-.alpha.-propyl-piperonyl amine and its analogs
Inventors:
Hui Li, Luigi Anzalone, Robert E. Waltermire
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Mar 21, 1997
Inventors
Hui Li
Luigi Anzalone
Robert E. Waltermire
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.