Granted Patent
Utility
US 4,256,739 · App. 05/607,983
7.beta.-Amino-3-thio-3-cephem-4-carboxylic acid compounds, and antibacterial compositions and methods using them
Inventors:
Robert B. Woodward, Hans Bickel
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Aug 26, 1975
Inventors
Robert B. Woodward
Hans Bickel
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.