Granted Patent
Utility
US 4,411,894 · App. 06/293,587
Pharmaceutical preparations
Inventors:
Jurg Schrank, Hans Steffen
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Aug 17, 1981
Inventors
Jurg Schrank
Hans Steffen
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.