Granted Patent
Utility
US 4,358,308 · App. 06/312,455
Herbicidal 4-perfluoroacetyl-, 4-perfluoromethylthio-, 4-perfluoromethylsulfinyl-, and 4-perfluoromethylsulfonyl-4'-nitrodiphenyl ethers
Inventor:
Colin Swithenbank
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Oct 19, 1981
Inventor
Colin Swithenbank
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.