Granted Patent
Utility
US 6,387,280 · App. 09/717,349
Process for reducing the amount of nitrification-inhibiting sulfur compounds
Inventors:
Curt Zimmermann, Helmut Sengstschmid, Willibald Scheuchenstuhl
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Nov 22, 2000
Inventors
Curt Zimmermann
Helmut Sengstschmid
Willibald Scheuchenstuhl
Assignee (at issue)
DSM Fine Chemicals Austria NFG GmbH & Co KG
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.