Granted Patent
Utility
US 6,380,391 · App. 09/779,626
Process for the preparation of bis(4-amino-1-pyridinium) alkanes
Inventors:
Wolfgang Beilfuss, Ralf Gradtke, Michael Streek
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Feb 9, 2001
Inventors
Wolfgang Beilfuss
Ralf Gradtke
Michael Streek
Assignee (at issue)
Air Liquide Santé (International)
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.