Granted Patent
Utility
US 5,229,426 · App. 07/867,253
Ethers useful for controlling pests
Inventors:
Friedrich Karrer, Alfred Rindlisbacher
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Apr 10, 1992
Inventors
Friedrich Karrer
Alfred Rindlisbacher
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.