Granted Patent
Utility
US 4,849,009 · App. 07/092,257
2-arylmethyliminopyrazines pyrazines, compositions and method of combating undesirable plant growth and of regulating plant growth
Inventors:
Helmut Zondler, Wolfgang Eckhardt, Robert Nyfeler
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Sep 2, 1987
Inventors
Helmut Zondler
Wolfgang Eckhardt
Robert Nyfeler
Assignee (at issue)
Ciba-Geigy
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.