Granted Patent
Utility
US 4,284,557 · App. 06/150,116
Intermediate racemates for the preparation of biotin and a process for their preparation
Inventors:
Enrico G. Baggiolini, Hsi L. Lee, Milan R. Uskokovic
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: May 15, 1980
Inventors
Enrico G. Baggiolini
Hsi L. Lee
Milan R. Uskokovic
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.