Granted Patent
Utility
US 6,420,465 · App. 09/729,021
Process for preparing phosphoric acid esters
Inventors:
Nikolaus Janke, Reinhard Pech, Andreas Chrisochoou, Dieter Heinz, Werner Bäcker, Kaspar Hallenberger
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Dec 4, 2000
Inventors
Nikolaus Janke
Reinhard Pech
Andreas Chrisochoou
Dieter Heinz
Werner Bäcker
Kaspar Hallenberger
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.