Granted Patent
Utility
US 4,294,925 · App. 06/205,478
Monensin urethane derivatives produced by streptomyces
Inventors:
Chao-Min Liu, John Westley
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Nov 10, 1980
Inventors
Chao-Min Liu
John Westley
Assignee (at issue)
HOFFMANN-LA ROCHE INC.
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.