Granted Patent
Utility
US 4,431,438 · App. 06/355,181
Aminoethane-methylphosphinic acid derivatives for influencing plant growth
Inventors:
William Hoyle, Rolf Vogel
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Oct 14, 1980
Inventors
William Hoyle
Rolf Vogel
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.