Granted Patent
Utility
US 4,239,648 · App. 06/057,155
Telomeric phosphorus corrosion inhibiting compositions
Inventors:
Alan Marshall, Norman Richardson
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jul 12, 1979
Inventors
Alan Marshall
Norman Richardson
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.