Granted Patent
Utility
US 4,254,136 · App. 06/068,261
Phenolic esters of N-trialkylureidothio-N-methyl carbamic acids useful as insecticides
Inventors:
Jozef Drabek, Manfred Boger
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Aug 20, 1979
Inventors
Jozef Drabek
Manfred Boger
Assignee (at issue)
Ciba-Geigy
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.