Granted Patent
Utility
US 6,500,952 · App. 09/664,201
Processes for preparing aminophenylsulfonylureas, and intermediates therefor
Inventors:
Gerhard Schnabel, Jan Vermehren, Lothar Willms
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Sep 18, 2000
Inventors
Gerhard Schnabel
Jan Vermehren
Lothar Willms
Assignee (at issue)
Hoechst Schering Agrevo GmbH
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.