Granted Patent
Utility
US 5,852,199 · App. 08/900,769
Method for making carbamazephine derivative
Inventor:
Chengrong Wang
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Jul 25, 1997
Inventor
Chengrong Wang
Assignee (at issue)
Dade Behring Inc.
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.