Granted Patent
Utility
US 4,244,827 · App. 05/871,865
Mixture of di- or trithiophosphoric acid diesters, processes for producing it and its use
Inventors:
Klaus-Peter Michaelis, Hermann O. Wirth
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Jan 24, 1978
Inventors
Klaus-Peter Michaelis
Hermann O. Wirth
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.