Granted Patent
Utility
US 5,969,152 · App. 08/888,889
Process for the preparation of nitropyrazole esters
Inventors:
Lutz Heuer, Nikolaus Muller, Guido Steffan
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Jul 7, 1997
Inventors
Lutz Heuer
Nikolaus Muller
Guido Steffan
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.