Granted Patent
Utility
US 6,235,937 · App. 09/652,072
Process for the preparation of nitrodiphenylamines
Inventors:
Henry Giera, Walter Lange, Torsten Pohl, Adolf Sicheneder, Christoph Schild
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Aug 31, 2000
Inventors
Henry Giera
Walter Lange
Torsten Pohl
Adolf Sicheneder
Christoph Schild
Assignee (at issue)
Bayer Aktiengesellschaft
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.