Granted Patent
Utility
US 4,885,285 · App. 06/773,707
Phosphorus compounds, processes for their manufacture, and their use
Inventors:
Gerhard Baschang, Albert Hartmann, Hans Hirt, Bohumir Lucas, Peter Wirz
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Sep 9, 1985
Inventors
Gerhard Baschang
Albert Hartmann
Hans Hirt
Bohumir Lucas
Peter Wirz
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.