Granted Patent
Utility
US 5,618,944 · App. 08/370,933
Method for the synthesis of anthrapyrazolones
Inventors:
Lin Zhang, Joseph Auerbach
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Jan 10, 1995
Inventors
Lin Zhang
Joseph Auerbach
Assignee (at issue)
The DuPont Merck Pharmaceutical 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.