Granted Patent
Utility
US 4,277,478 · App. 06/041,279
Antibiotic and use thereof
Inventors:
Hans Zahner, Hannelore Drautz, Walter Keller
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: May 21, 1979
Inventors
Hans Zahner
Hannelore Drautz
Walter Keller
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.