Granted Patent
Utility
US 6,117,821 · App. 09/309,432
N-(heterocyclylcarbonyl)sulfonamide herbicides
Inventors:
Colin M. Tice, Bin Li
Patented Case
View Patent ↗
Granted: Sep 12, 2000
Filed: May 11, 1999
Inventors
Colin M. Tice
Bin Li
Assignee (at issue)
Rohm and Haas 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.