Granted Patent
Utility
US 5,414,136 · App. 08/235,579
Method for the preparation of 4-halo-2'-nitrobutyrophenone compounds
Inventor:
David A. Cortes
Patented Case
View Patent ↗
Granted: May 9, 1995
Filed: Apr 29, 1994
Inventor
David A. Cortes
Assignee (at issue)
American Cyanamid Company
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.