Granted Patent
Utility
US 4,242,119 · App. 06/007,138
Agent for combating sea-water algae
Inventors:
Dagmar Berrer, Joachim Lorenz, Reinhardt Grade
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Jan 29, 1979
Inventors
Dagmar Berrer
Joachim Lorenz
Reinhardt Grade
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.