Granted Patent
Utility
US 5,681,968 · App. 08/515,846
4-phenoxycoumarins as herbicidal agents
Inventors:
Sergio I. Alvarado, Pierre A. Marc, Brian J. Dahlke, Eileen Reilly-Horch
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Oct 10, 1995
Inventors
Sergio I. Alvarado
Pierre A. Marc
Brian J. Dahlke
Eileen Reilly-Horch
Assignee (at issue)
American Cyanamid Company
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.