Granted Patent
Utility
US 5,635,449 · App. 08/418,985
Arylthioalkyl- and arylthioalkenylphosphonic acids and derivatives thereof useful as herbicidal agents
Inventors:
Charles M. Langevine, John Finn
Patented Case
View Patent ↗
Granted: Jun 3, 1997
Filed: Apr 7, 1995
Inventors
Charles M. Langevine
John Finn
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.