Granted Patent
Utility
US 4,681,621 · App. 06/804,027
Herbicidal 2-(2-substituted benzoyl)-1,3-cyclopentanediones
Inventors:
David L. Lee, William J. Michaely
Patented Case
View Patent ↗
Granted: Jul 21, 1987
Filed: Dec 3, 1985
Inventors
David L. Lee
William J. Michaely
Assignee (at issue)
Stauffer Chemical 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.