Granted Patent
Utility
US 6,815,562 · App. 10/751,311
Process for the preparation of nitrodiphenylamines
Inventors:
Klaus Kunz, Joachim Haider, Dirk Ganzer, Ulrich Scholz, Adolf Sicheneder
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Jan 2, 2004
Inventors
Klaus Kunz
Joachim Haider
Dirk Ganzer
Ulrich Scholz
Adolf Sicheneder
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.