Granted Patent
Utility
US 4,445,930 · App. 06/302,921
Herbicidal 4-trifluoromethyl-4-nitrodiphenyl ethers
Inventors:
Horst O. Bayer, Colin Swithenbank, Roy Y. Yih
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Sep 16, 1981
Inventors
Horst O. Bayer
Colin Swithenbank
Roy Y. Yih
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.